The jammer effectively disables cellular phones. These devices can be used in practically any location, but are found primarily in places where a phone call would be particularly disruptive because silence is expected. Operation: As with other radio jamming, cell phone jammers block cell phone use by sending out radio waves along the same frequencies that cellular phones use. This causes enough interference with the communication between cell phones and towers to render the phones unusable. On most retail phones, the network would simply appear out of range. Most cell phones use different bands to send and receive communications from towers (called frequency division duplexing, FDD). Jammers can work by either disrupting phone to tower frequencies or tower to phone frequencies.
Effective isolating/shielding diameter: 10-50 meters, Jamming signal bandwidth, CDMA:850-894MHz,GSM: 925-960 MHz, DCS:1805-1880MHz, P HS: 1900-1990 MHz, 3G:2010-2025 MHz (China) / 2110-2170(Other countries). Working time: it can work stably for a long time, Environment temperature: - 45? to +55?, Relative humidity? 30% -- 95%, Semi diameter of interception : (2-50) m-75dBm.
The device can choose to local or remote, remote with long distance conveniently., 4-channel type can efficiently provide shield for mobile signals from CDMA, GSM, DCS and PHS/ 3G(can choose);, It Only shields the signals from mobile phone and does not affect the normal operation of other electronic devices, Slow start-up circuit can avoid sparkling caused by mechanical switch
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