カテゴリー別アーカイブ: blocker

By producing a “no response” or cosine error, a laser jammer effectively obstructs the accuracy of a laser radar gun aimed at a vehicle by a police officer. As a result, the police officer is left uncertain about whether the vehicle is equipped with a laser jammer or if their aim is flawed.

A laser jammer is a gadget that produces a “no response” or cosine error when a police officer directs a laser radar gun at a vehicle. This error prevents the police officer from knowing whether the vehicle is equipped with a laser jammer or if they are not aiming correctly at the vehicle.

How to jam police lasers?

The effective defense against a laser requires the front laser jammers to provide protection for the headlights, license plate, and the reflective surfaces in their vicinity. Conversely, at the rear, the primary targets are the license plate and tail lights. Moreover, the center high-mounted stop light, backup lights, and vertical reflective surfaces are also vulnerable. It is noteworthy that even a tailgate-mounted spare tire/wheel assembly can be targeted, as evidenced by our successful attempt at hitting a Jeep Wrangler’s aluminum spare wheel from a distance of 2,500 feet.

Can you install a laser signal jammers on your car?

California Vehicle Code Section 28150 (Division 12: Equipment of Vehicles, Chapter 5: Other Equipment, Article 17: Jamming Devices) states the following:

(a) No vehicle shall be equipped with any device that is designed for, or is capable of, jamming, scrambling, neutralizing, disabling, or otherwise interfering with radar, laser, or any other electronic device used by a law enforcement agency to measure the speed of moving objects.

(b) No person shall use, buy, possess, manufacture, sell, or otherwise distribute any device that is designed for jamming, scrambling, neutralizing, disabling, or otherwise interfering with radar, laser, or any other electronic device used by a law enforcement agency to measure the speed of moving objects.

(c) Except as provided in subdivision (d), a violation of subdivision (a) or (b) is an infraction.

(d) When a person possesses four or more devices in violation of subdivision (b), the person is guilty of a misdemeanor.

(e) Notwithstanding any other provision of law, a person who has a valid federal license for operating the devices described in this section may transport one or more of those devices if the license is carried in the vehicle transporting the device at all times when the device is being transported.

Can police radar measure speeds or more than one vehicle?

The speed of multiple vehicles can be captured at once by dash-mounted police radars, usually up to two.

Today, radar systems have the ability to target multiple vehicles simultaneously, identifying the fastest vehicle in a group and the vehicle with the emest radar signal reflection at the same time. Nonetheless, visual confirmation by the officer is necessary to determine the fastest vehicle among those targeted.

Have you ever been the victim of a police laser gun and been ticketed for speeding? If your answer is yes, then you may want to take countermeasures to help you prevent such encounters. Well, your problem can be solved. Check out the tools that help prevent speeding tickets – defensive laser jammer!

By emitting a signal that interferes with the laser gun’s speed detection capabilities, a laser signal jammer is able to confuse the gun.

To comprehend this, it is crucial to have a clear understanding of how a laser gun operates. This device is utilized to aim a laser beam directly at your license plate or any reflective surface.

The development of laser jammers aimed to assist in the notification of laser speed traps.

Through the analysis of received traffic laser signals, laser jammers can effectively disrupt the source of the signal. Consequently, the source device fails to detect any activity and presents the operator with an unread or misdirected message.

The presence of an automatic shut-off feature is a fundamental characteristic of high-grade jammers, ensuring their immediate deactivation upon the detection and confirmation of a laser threat.

Uninterrupted laser interference can potentially lead to a confrontation with a law enforcement officer who is aiming at you but has not acquired the speed reading of your vehicle.

What are the advantages of using laser jammers?

Diminish the likelihood of accruing more speeding violations: Too many speeding tickets can result in the deduction of numerous points, putting your driver’s license at risk and causing you to waste your hard-earned money. For professional drivers, losing their license means losing their livelihood. Investing in a laser jammer is akin to taking preventive action.

Your radar detector let you down in this instance. A radar detector can warn you of a police laser gun aiming at your car. However, radar detectors are passive, and laser guns can measure your speed in less than half a second. This means that by the time you receive a warning, the officer may have already determined your speed. On the other hand, a laser jammer is active and prevents the laser gun from calculating your speed for a set period.

Although it may appear to be a walkie talkie at first glance, that unassuming little box holds far more power than one might assume. Once activated, a mobile phone signal jammer can effectively block all cell phone signals in the surrounding area. However, it is crucial to note that utilizing such a device is not only a violation of federal law but also carries the risk of a substantial $16,000 fine and potential incarceration.

The presence of talkative cell phone users on the SEPTA 44 bus in Philadelphia did not deter Eric. According to NBC 10, Eric would activate a block signal jammer to block out the conversations that he found bothersome.

“A lot of people are extremely loud, no sense of just privacy or anything. When it becomes a bother, that’s when I screw on the antenna and flip the switch,” Eric told NBC 10.

Eric stated that he was unaware of the fact that blocking a cell phone signal was illegal, considering it to be a “gray area.” He believed that it was only considered illegal when it pertained to blocking television or radio signals.

In spite of this, he did not seem particularly sorry for his actions.

He proudly admitted to NBC 10 that he is taking on the responsibility of enforcing the law independently.

The use of jammers, like the one employed in this situation, is against the law due to their potential to disrupt cell phone communication during emergencies and interfere with vital signals like police radio and other two-way radios.

Eric announced his intention to dispose of the jammer he had purchased upon learning that it was illegal, with ABC News estimating its cost at $300.

Yet, the key issue is that Eric is not the sole individual partaking in this jamming practice.

Prior to assessing the effect of a mobile phone signal jammer on laptop Internet access, it is crucial to comprehend the interference frequency band utilized by the jammer and the frequency band employed by laptops to access the Internet.

First of all, if the interference frequency band of the mobile phone signal jammer overlaps with the frequency band used by the laptop to access the Internet, it will affect the laptop’s Internet access function. Let’s first take a look at the interference frequency band of cell phone jammers. Due to the wide signal coverage of domestic operators and the wide range of application standards, mobile phone signal jammers must achieve the effect of blocking the entire network. Generally, they will effectively block interference for 2G, 3G, 4G band signals, WiFi, GPS, and Bluetooth signals.

Having identified the frequency bands that the cell phone signal blocker described above can interfere with, let us now turn our attention to the frequency bands that laptops utilize for Internet connectivity.

Laptops generally have two ways to access the Internet, one is wired Internet access, that is, Ethernet network port Internet access, and the other is wireless Internet access. At present, mobile phone signal jamming device cannot block or interfere with wired Internet access, so here we mainly describe the frequency bands for laptop wireless Internet access. According to the current classification of laptops on the market, wireless Internet access supports single-band and dual-band. The so-called single-band refers to only supporting WiFi2.4 frequency band to connect to the Internet, while dual-band supports WiFi2.4 and WiFi5.8 frequency bands to connect to the Internet. Most laptops only support single-band, and some that are more expensive or have more conscientious configurations will be equipped with dual-band Internet access.

The interplay between signal blockers and laptop computers’ working frequency bands becomes apparent to keen observers, who can readily recognize the potential disruption of laptop Internet access by mobile phone signal jammers.

Detailed requirements are broken down into the following situations:

1.The mobile phone signal jammer does not have a WLAN module and will not affect the wireless Internet access of laptops;

The mobile phone signal jammer supports the WiFi2.4 frequency band, which affects the wireless Internet access of single-band laptops but does not affect the wireless Internet access of dual-band laptops;

The mobile phone signal jammer supports WiFi2.4 and WiFi5.8 frequency bands, which will affect the wireless Internet function of the laptop.

Through the comprehensive understanding gained from the preceding explanation, we have obtained a clear answer regarding the potential interference of a mobile phone signal jammer on a laptop’s Internet access. It has been established that the laptop’s wireless Internet connectivity may be disrupted by the operation of a signal jammer. To ensure uninterrupted access, customers who utilize signal jammers for shielding purposes should consider equipping their laptops with Ethernet cables to establish connections with external network offices. This approach will enable them to achieve optimal performance in both aspects.

The NFL and federal law enforcement are on high alert for unauthorized drones after one caused a play stoppage at a playoff game two weeks ago.

Super Bowl LVIII will feature a tough defensive scheme that has nothing to do with a football. This one is about stopping drones.

The NFL and federal law enforcement officials are taking a hard line Sunday to keep players and fans safe from unauthorized drones at Allegiant Stadium in Las Vegas where the Kansas City Chiefs will play the San Francisco 49ers.

Unapproved drone flights have become a persistent problem for the NFL, as well as for other sports leagues and large public gatherings. The NFL said there were about 2,500 drone incursions near stadiums during the 2022-2023 season, an increase of about 90% from a year earlier.

The flights have sometimes encroached on televised broadcasts, including two weeks ago at the AFC championship game in Baltimore when an unapproved drone violated the restricted airspace. Federal prosecutors later charged a Pennsylvania drone pilot who said, according to the FBI, that he wasn’t aware of the flight restrictions.

Possible criminal charges and civil penalties await anyone trying something similar Sunday, officials said.

“So please leave your drone at home,” Cathy Lanier, the NFL’s chief security officer, said at a news conference Wednesday.

Most of the drones are operated by hobbyists seeking aerial video, according to experts, but especially at a high-profile event such as the Super Bowl, authorities said they’re also looking out for people with more nefarious intentions.

Homeland Security Secretary Alejandro Mayorkas said the incident two weeks ago was a warning.

“It does not require much imagination to understand the significant threat such an incident could pose,” he said at the news conference Wednesday. Although no one was hurt in that incident, he said, “what happened in Baltimore underscores the vital importance of the mission.”

Mayorkas added that there were no known credible specific threats to the Super Bowl or Las Vegas.

Federal law enforcement designates the Super Bowl as a top-tier security event, on roughly the same level as a presidential inauguration ceremony or a visit by the pope. Allegiant Stadium, where the teams will play, has a capacity of about 65,000 people.

Any stadium’s defense against drones has multiple layers, said Mary-Lou Smulders, chief marketing officer for Dedrone, a Virginia-based company. Its drone countermeasure technology is in use by the Las Vegas Metropolitan Police Department, which covers Las Vegas and its major stadiums.

“Like any security issue, the more layers you add, the safer you are,” she said. “The same applies to airspace security.”

The first layers, she said, are all designed to detect and track drones using at least three types of technology: radio-frequency sensors, cameras and radar. They have different strengths, she added: Radio-frequency sensors can distinguish between drones and other objects better than radar, while radar has a longer range and a camera can help determine if a drone is carrying a payload.

With a camera, Smulders said, “the most interesting thing to ask is: Is it carrying a payload, yes or no?” If it were, that “would dramatically affect your security posture.”

A second set of layers is designed to interfere with a drone’s flight, she said: “cell phone jammer jamming” or cutting off the radio communication between a drone and its pilot; hacking into a drone to take over control; and locating the pilot on the ground and arresting the person.

drone jammer Jamming and hacking are not usually available as security tools for an NFL game. Federal law restricts who can interfere with a drone’s flight, and in the United States, only a few government agencies including the Department of Homeland Security and the FBI have the authority to do so. Congress is considering legislation to change that but, for now, the federal government provides agents for high-profile events like the Super Bowl but not for a game on any given Sunday.

At a regular season game in Baltimore in November, play was delayed twice because of drone activity.

The NFL game stoppages are helping raise the profile of drone countermeasures, a growing industry that experts say will become more important as drone technology improves and becomes cheaper.

Allegiant Stadium has one advantage over Baltimore’s: It’s a domed stadium, with a roof to shield the game from anything overhead. But it’s not completely enclosed, Smulders noted: The stadium has 80-foot walls that are retractable if weather allows. The doors have usually been closed during games.

Still, the NFL is on higher alert for drones than it used to be. In 2017, a California man used a modified drone to drop leaflets on the 49ers stadium, authorities said. He then drove to nearby Oakland and did the same at a Raiders game. He later pleaded guilty and was sentenced to probation.

For Sunday, the Federal Aviation Administration has banned drones within a radius of 30 nautical miles (about 35 miles) of the stadium beginning one hour before kickoff. There have also been restrictions in place for additional events in Las Vegas the past few days.

Lanier has previously told NBC News that the NFL had a close call at the Super Bowl in Atlanta in February 2019, when an FBI team spotted a drone just before six Air Force F-16s were set to conduct a flyover before the game. The F-16s flew at a higher altitude to avoid a possible collision, she said.

I read a few of the news articles and it sounds like the thieves are jamming WiFi and the sensors. This prevents the system from even triggering. The thieves are walking around the homes without the glass break, door, and motion sensors going off it seems.

Not commonplace, but getting some exposure in the news recently – gangs of organized thieves in metro Detroit area are targeting upper scale homes for burglaries. They are purportedly using wifi jammer to circumvent alarms (like Ring).

What can millions of Ring (and customers from other wifi-dependent alarm companies) do about this? IS there a viable counter to these signal jammer? Maybe it’s time to explore legacy, analog wired alarm solutions as backup instead of the reverse?

They’re using a wifi jammer, according to this article. No obvious way to prevent this, so hardwired systems would be the only resistant option.

Most Wi-Fi jammers use disassociation flooding to kick the devices off the network. This attack is prevented with WPA3 which can use protected management frames. Unfortunately Ring still hasn’t got around to adding WPA3 support to its devices. It was requested via their feature request process a long time ago, so I’m not overly hopeful they’ll add it.

There are trade offs and risks with each security system. There’s also different types of burglars from opportune amateurs to seasoned pros.

If you’re concerned about this threat, there’s a raft of solutions out there with high definition footage without any reliance on Wi-Fi or internet.

Whatever they’re using for jamming must go beyond the WiFi frequencies to affect z-wave and whatever frequency Honeywell et al uses for their RF communications.

This makes sense because most alarm systems these days (even ADT/Brinx/etc) rely mostly on wireless sensors.

This is a huge vulnerability because it’s pretty rare to find a security system that’s been installed to use all hardwired sensors. To go hardwired you probably had to have it built-in as the house was built or did it while doing some major remodeling.

Cellular jammers are readily available. DSL, cable, or fiber are not jammable, but all devices need to be hardwired.

Zwave can be jammed just as easily as wifi. Cellular is great but if the door/window sensors are blocked and unable to report to the base station, the alarm won’t think anything is wrong.

What I found when doing some simple research over the last couple of days is that different manufacturers use different frequencies for their devices so it might be a guessing game for the burglar, although my guess is that the professional burglars carry jammers for most of the common frequencies used by the big name brands like Ring, Simplisafe, Nest(ADT), etc.

To me it makes sense to have devices from different brands. Ring doorbell, ADT alarm, Wyze cameras, etc…

What’s scary is that there are a bunch of videos on youtube demonstrating how easy it is to bypass these alarms AND with instructions telling you exactly how to do it and how to get the jammers.

Is this pervasive? If you watch the news, it’s pretty evident thieves aren’t concerned with cameras. They mask up and hood up and go. Be on alert, they have no fear.

Burglars can use wide-band jammers to jam all frequency bands : GSM, LTE, Wifi and Z-Wave. Some alarm systems are robust to such attacks (like Ajax Alarm System — https://ajax.systems/blog/what-is-jamming/).

In short, the alarm hub must be hardwired with Ethernet to your router; And hub, router and modem on a battery backup. Then, only communications between sensors and hub can be jammed.

Then, alarm hub communicates frequently with sensors. If communication fails, it signals a jamming attack, notifying the user via hardwired Internet. With a working speaker on the hub, it can sound a siren and send a voice alert to the intruders.

SimpliSafe system is another system that offers some jamming protection, but lacks the Ethernet hardwired connection, so it must rely on a GSM/LTE link, which is still better than Wifi alone.

A deadline in May looms for the oilfield company to contest a $126,000 fine imposed by the Federal Communications Commission. This fine was assessed against the company for its disruption of cellphone calls.

Taylor Oilfield Manufacturing Inc. of Broussard was accused of utilizing four cellular phone jammers to restrict cellphone use by employees, leading to the FCC adopting a notice of apparent liability on April 9.

The FCC was informed by company officials that the cell jammers, intended to disrupt cellphone signals, were utilized to prevent employees from using their cellphones while at work.

Taylor has been allotted 30 days starting from April 9 to either remit the penalty or present a written argument to the FCC as to why the fine should be annulled or lessened.

Taylor officials chose not to answer phone calls asking for a response.

The case was instigated following a tip received by the FCC, prompting them to send an agent to the company site in Broussard in May 2012. As stated in the FCC notice, company officials confirmed the usage of four cell jammers and the possession of a fifth cell jammer, which was not operational at the time.

Cell jammers are not allowed to be used within the United States, and the FCC has imposed a ban on companies importing these devices from outside the country. The FCC stated that the Broussard company admitted to acquiring its cell jammer from overseas suppliers.

In its notice to the company, the FCC emphasized the tangible danger to public safety posed by the illegal use of signal blockers. This hazard includes the potential blocking of authorized communications, such as emergency calls to 911 and law enforcement communications. Moreover, the use of cell jammers can have adverse effects on global positioning system signals.

According to FCC records, Taylor’s representatives reported that the company endeavored to prohibit employee cellphone use following a near accident that was partly associated with an employee using a cellphone.

The removal of all cellphone jammers from prisons has been carried out quietly by Corrections.

The introduction of technology in 2008-09 to prevent inmates from accessing smuggled mobile phones has resulted in a total cost of over $17 million.

As of June, jammers have been rendered obsolete after being found to interfere with the effectiveness of the newly introduced safety systems for prison guards.

Minister of Corrections, Phil Goff, highlighted the introduction of cellphone blocking in New Zealand prisons as a pivotal development that will effectively prevent inmates from carrying out additional offenses while incarcerated.

The Official Information Act was utilized to gather recent data on the amount of cellphones taken from the 18 prisons overseen by Corrections during the previous three years.

From January 2020 to November of this year, the Corrections staff discovered 626 cellphones and more than 750 cellphone-related items, like batteries, chargers, and SIM cards.

Neil Beales, the Corrections chief custodial officer, clarified that the absence of cellphone jammer in the prison since June was the cause behind inmates smuggling cellphones.

As per his statement, it was found that the jammers were interfering with the functionality of recently implemented safety systems, specifically affecting alarms utilized for the safety of corrections officers.

Improvements in mobile technology have caused jammers to become increasingly outdated.

According to Beales, the mentioned tool was just one of several tools utilized to prevent the use of cellphones in prisons. He highlighted that there are still numerous other more effective tools that continue to be implemented.

Cellsense devices excel in the detection of metals commonly found in cellphones, offering a comprehensive solution. Alongside their screening and x-ray capabilities, these devices utilize specially trained dogs to enhance their metal detection capabilities.

Beale highlighted that certain individuals in prison resort to extreme and elaborate measures to introduce contraband into prisons, and we are consistently working to anticipate the new methods used for smuggling contraband into our correctional institutions.

As per the spokesperson, Corrections has been exploring new and emerging technology to complement their current systems. They have initiated the use of full body imaging technology at several sites to detect contraband concealed on or within individuals.

It was revealed in 2018 that Corrections had implemented cellphone jamming technology, resulting in a communications blackout near Rimutaka Prison and the subsequent inability to monitor residents of a child sex offender unit outside the prison grounds.

Inmates may exploit cellphones to manipulate individuals outside the prison walls and to organize illegal activities like drug transactions. Nine prison staff members at Rimutaka were suspended in May for alleged misconduct, including the smuggling of cellphones into the facility.

It is unsurprising that Corrections has opted to abandon the use of jammers, as Roger Brooking, a drug and alcohol counsellor and criminologist, has been vocal about his reservations regarding the expenditure on this technology.

It was his assertion that they are ineffective and have never been successful.

From what I have been told by prisoners, they have found certain locations within the prison where the signal blockers is ineffective. This has allowed inmates to continue using cellphones for purposes such as conducting illegal deals or communicating with their families.

A cell phone jammer is an electronic device that can obstruct the reception or transmission of cell phone signals by generating interference within the frequency bands used by mobile phones. By transmitting signals on the same radio frequencies as cell phones, the jammer disrupts the communication between the phone and the nearest cell phone tower, effectively rendering the phones within its vicinity unable to receive signals.

When contemplating the purchase of a cell phone jammer, it is advisable to take certain factors into consideration:

• What is the required range of coverage for the cell phone jammer?
• Are you seeking a small and inconspicuous cell phone jammer that can be conveniently carried in your pocket?

When it comes to reducing disturbances caused by people nearby in public spaces or silencing the use of cell phones within your business or educational institution, cell phone jammers provide numerous advantages. However, it is vital to conduct thorough research in advance to ensure the purchase of a signal jammer that will effectively meet your specific requirements.

When searching for cell phone jammers for sale, you should take the following into consideration…

1. What is the length of time the vendor has been in business?
2. Is the vendor offering a range of products, or are they exclusively selling signal jammers?
3. What is the desired range of coverage for the cell phone jammer?
4. Are you searching for a discreet (handheld) cell phone jamming device that can fit easily into your pocket?
5. Are you seeking a cell phone jammer that suits your application requirements, with options available for portability, fixed installation, or vehicle-based usage?
6. Are you in the market for an unusual item or a legitimate cell phone signal blocker?

Effective measures should be taken to eliminate potential safety hazards and jammer gps buy ensure the safety of gas stations.On the one hand, the customer does not know the safety management regulations of the gas station, and believes that it is unnecessary for the gas station employees to let them use their mobile phones in the gas station, which is prone to rebellious psychology.

One of the more difficult to manage is the prohibition of customers using mobile phone calls in gas stations mobile signal jammer.The exercise of any right is limited and must not prejudice the rights of others or the public interest.The freedom of communication and speech that citizens enjoy in accordance with the Constitution and the law shall not exceed their due scope.As we all know, gas stations dealing with flammable and explosive materials are high-risk industries, and “safety first” is the most basic requirement for gas stations.Common safety measures at gas stations mainly include turning off motorcycles to refuel, gas station employees must wear anti-static clothing to work, prohibiting open flames and using mobile phone calls in gas stations, and not refueling in plastic buckets, etc.

Because refueling and gas stations are now generally controlled by computers, high-intensity mobile phone signals will cause induction with computer equipment, and the instantaneous electronic friction between the two may ignite fuel vapor and cause an explosion.Therefore, it is recommended to connect the power of the shield to the battery of the car as much as possible to ensure that the device can work continuously.In recent years, with the rapid development of mobile phones, it is not uncommon for students to use mobile phones to affect their life and learning.It is still one or two o’clock, so in order to prevent students from playing mobile phones in the middle of the night and give themselves a better rest, many schools have to choose to install wifi jammer in their dormitories.

On the other hand, the customer knew that he could not use the mobile phone in the gas station, but he was lucky, and one-sidedly believed that the accident would not happen when he was using the mobile phone, so he did not listen to the persuasion of the gas station staff and went his own way.Strictly speaking, vehicle anti-monitoring and anti-tracking is a comprehensive professional discipline.It integrates communication engineering, radio technology, electromagnetic research, information science, network security, psychology and other disciplines.If the car turns off halfway, the jammer gps will definitely be powered off, then the location information of the car will be exposed again.

As long as the RF spark lasts for more than one microsecond and the energy is greater than 6 milliwatts, it will ignite the methane-air mixture.So is it enough to put a high-power mobile signal jammer? Is every room in the school dormitory like a school exam room? Actually, how to select and install it is explained below.The cell phone signal jammer gps in the school dormitory are mainly used at noon and evening when students are resting.The wifi jammer gps can be big or small, and there are many channels in any frequency band of mobile communication.Obviously, the school’s behavior is mild and does not affect students’ freedom of communication and expression.

Some students often use their mobile phones to surf the Internet in bed, and some even use their mobile phones to surf the Internet in the middle of the night.At the same time, in order to make the communication signal clearer, the frequency of mobile phone use is very high, and the transmission power is relatively strong.Since gasoline is a volatile substance, in the combustible danger area formed by the leakage of oil and gas tanks and natural gas pipelines, the radio frequency sparks generated by mobile phones can easily cause explosions and lead to disasters.When RF current circulates between metal conductors, RF sparks will be generated in case of corrosion or poor contact.

This type of jammer gps can basically be powered by the cigarette lighter, so after being installed in the car, it must be ensured that the jammer GSM is always in working state.At present, the main way for gas stations to prohibit customers from using mobile phone calls at gas stations is to persuade, but sometimes the effect of persuasion is not ideal.The current required to ignite the fuel gas is very small, and the static current generated by the mobile phone in the working state can completely reach this limit.Although it meets the national standard, it still poses a serious threat to refueling and gas stations.

That is to say, there is no need to shield the mobile phone signal 24 hours a day, so the shielding device of the ordinary power supply such as the external adapter is also optional.As a radio communication tool, the mobile phone emits radio waves, which can induce radio frequency currents in the antenna that receives the radio.Why can’t you make phone calls in the gas station? Some people think that it is alarmist that a mobile phone can cause an explosion at a gas station, and they have never heard of an explosion caused by a mobile phone.First of all, people have misunderstandings about the safety hazards caused by using mobile phones in gas stations.