Cell Phone Blocking Backpack
Mobile phone signal jammers are mainly used in various examination rooms, schools, churches, courts, libraries, conference centers, etc. and other places where the use of mobile phones is prohibited. With the development of the market, Cell Phone Blocking Backpack brands are becoming more and more powerful, and the quality and price are also different. So how to choose the right mobile phone signal jammer? We mainly consider the following 7 points: 1. Shielded frequency band: Before purchasing, you must know which signals you want to shield. The usual mobile phone signal (234G) can be selectively shielded. If you only shield 2, 3G or only shield 3, 4G, this can be adjusted before leaving the factory. In addition, the mobile phone signal jammer of our company uses full-band shielding. If users need to shield a certain signal, they only need to install the corresponding antenna on the machine. 2. Applicable occasions: For applications related to shielding, if it is an indoor application, mobile jammers that are usually suitable for examination rooms, conference halls, offices and other spaces are a category. Gas stations must be explosion-proof and high-temperature resistant; if it is an outdoor open area In this case, a medium-power device must be used to achieve a suitable spacing. cell phone jammer
3. Appearance: Appearance on the top Cell Phone Blocking Backpack can be divided into external antenna and built-in antenna. Generally speaking, the external antenna extends outwards because the antenna is external, so it occupies a larger space than the built-in antenna ;Because of the extended antenna, the effect of the external antenna is a bit more stable. 4. Power size: mobile phone jammers can usually be divided into low power, medium power, and high power. The power is 3W-100W. When we recommend that users choose mobile phone signal jammers, it will be determined by the total area of shielding required. 5. Shielding range: The shielding range is proportional to the power. Usually, the test room uses low-power mobile phone jammers. It is enough to install one in a classroom, and the approximate shielding range is 200 square meters; while high-power mobile phone jammers, The shielding distance can be 300-400 meters, depending on the local field strength. 6. Body shape: Generally speaking, the smaller body size must be handheld and portable, relatively small in size and easy to carry; the low power of the table type is usually not very large, and it is similar to a small notebook computer; high power It’s relatively heavy, and the tow-box body is particularly large. 7. Power supply: The hand-held mobile phone jammer is a built-in lithium battery. After the battery is used up, the power adapter can be used to charge; the desk-type examination room uses 220V voltage power supply, and the car-mounted application usually uses 12-36V voltage power supply. .