People use cell phone jammer to protect their privacy!!
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- Страна: США
- Размещено: 29.08.2019 11:48
- Истекает через: Это объявление истекло
A cell phone jammer is a device that blocks transmission or reception of signals, usually by creating some form of interference at the same frequency ranges that cell phones use. As a result, a cell phone user will either lose the signal or experience a significant loss of signal quality.
Cell phone jammers have both benign and malicious uses. Police and the military often use them to limit or disrupt communications during hostage situations, bomb threats or when military action is underway. Portable personal jammers are available to enable their owners to stop others in their immediate vicinity (up to 60-80 feet away) from using cell phones.
Prisons want jamming technology to stop criminal activity, Schools use cellphone jammers to keep students focused on their studies， Car owners use GPS jammers to prevent tracking etc. Therefore, it is necessary to have a fully functional mobile phone signal jammer.
At present, mobile phone signals in various countries of the world have similar frequencies, mainly including GSM 3G and 4G. The frequency range is mainly as follows: 850-894MHz / 925-960MHz / 1805-1880MHz / 1920-1990MHz / 2110-2170MHz / 2345-2400MHz / 2620-2690MHz / 725-770MHz / 790-825MHz.
Different jammers have different interference frequency bands. Each signal jammer generally has a variety of interference signal band combinations to choose from, including GSM, 3G, 4G mobile phone signal, GPS, WiFi, UHF, VHF, bluetooth, wireless video, etc.. Portable signal jammer is easy to carry, beautiful appearance, favored by customers. And small size, light weight, easy to use anywhere. It is widely used in indoor and outdoor mobile phone shielding, among which vehicles, schools, gas stations and meeting rooms are the main application places.
When buying, it is necessary to perusal the characteristics of each jammer product: output power, interference frequency band, interference radius, applicable place, etc, and choose the most suitable product according to your own needs.