![]() In order to prevent candidates from cheating and ensure the fairness of the test, cell phone blockers are essential. There are large and small exams in our life, the middle school entrance examination and the college entrance examination, the fourth and sixth grade exams. If there is no signal, the mobile phone naturally cannot communicate with the outside world. In important places such as examination rooms and prisons, cell phone jammer are used to block the signal. cell phone blocker principle is that the frequency of its own communication facilities will interfere with the frequency of the receiving the base station and the wireless router, so as to achieve the purpose of shielding them. The current cell phone jammer is full frequency band, it can block all gsm 2/3/4/5G signals and 2.4/5.8G WIFI signals and Bluetooth signals under all communication operators. Now important exam rooms need cell phone blocking device to prevent candidates from contacting the outside world through wireless signals. The use of unauthorized aids such as mobile phones, smartphones, tablets, wearables or similar in exam situations is considered an attempt at cheating.įor some time now, auditors have been increasingly observing a remedy through the use of so-called mobile phone jammers.Ĭell phone signal jammer have become standard in important places such as exam rooms/prisons/churches/governments. ![]() The problems in exam situations are well known. The application of cell phone jammers in important occasions Since the interfering signal and the communication signal are transmitted on the same frequency, they will cancel each other out, resulting in the mobile phone not being able to receive the signal from the base station. The specific working principle of the cell phone blocker is to use electronic circuits to generate electromagnetic signals of a certain frequency, which will interfere with the communication signals between the mobile phone and the base station. These interference signals include electromagnetic waves or microwave signals, which can interfere with the wireless signal transmission between the mobile phone and the base station, so that the cellphone cannot be used normally. The phone jammer will send interference signals to the mobile phone, so that the it cannot receive and send signals normally. The wireless communication signal between the cell phone and the base station is based on radio frequency (RF) technology. The mobile jammer (also known as cell phone signal blocker) is to use the principle of electromagnetic interference to prevent wireless signal transmission between cellular phones and base stations. This article will give you a detailed introduction to various information about cell signal jammer. While it brings convenience to people, it also brings The expected disadvantages have resulted in the cell phone killer - mobile phone jammer. However, GSM cell phone are a double-edged sword. * Can prevent mobile phones from becoming a tool for criminals to commit crimes.In 2023, when cell phones are popular, mobile phones have shortened the distance between people and brought great convenience to people. * Can be used to block cell phone and GPS location, tracking and surveillance ![]() * It can be used in important places such as conference rooms, courts, libraries, etc. * It can be used in places where the use of mobile phones is prohibited, such as examination room, gas stations, oil depots, and gas stations * Green and environmentally friendly, no harm to human health. * Can be used on the desktop or hung on the wall * Built-in heat sink and exhaust fan, excellent heat dissipation effect * Single channel switch to control the masked frequency band ![]() * The shell is made of aluminum alloy material, which is waterproof, heat-resistant and pressure-resistant * 18 external fiberglass omnidirectional antennas for easy installation and quick shielding And shield frequency bands can be customized such as cell phone signal 2G 3G 4G 5G, wifi 5.8G ,2.4G ,5.2G, GPS ,VHF ,UHF ,Lojack ,etc. Compared with other similar blockers on the market, it can better shield wireless signals within a radius of 5-50 meters. This is a high-power cell phone WIFI signal blocker with 18 external glass fiber omnidirectional antennas. High Power WiFi Desktop Cell Phone Signal Jammer Wholesale Price 18 Channel Cell Phone 2G 3G 4G 5G WiFi GPS VHF UHF Desktop RF Signal Jammer Blocker Scrambler Isolator ![]()
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