This Mobile phone signal jammer (signal isolator/breaker) product is suitable for where forbid to use mobile phone. CDMA 870-880 33 8dBm/30KHz GSM 930-960 33 5dBm/30KHz DCS 1805-1880 33 2dBm/30KHz PHS 1900-1990 33 2dBm/30KHz 3G TD-SCDMA 2010-2025 33 2dBm/30KHz 3G WCDMA and CDMA2000 2110-2170 33 2dBm/30KHz Power Consumption :36W Size : 251*140*52MM Power supply: AC: 110-240V DC: 4.2V 8A Jaming Range :2-50(diameter) meters (according to the mobile operatorsí» signal condition ) Work Temperatureú¦-40degree to +55 degree Application: Audio-visual areas: theater, cinema, concerts, library, studio, auditorium, etc.; Security Privacy: prison, court, examination room, meeting room, funeral parlor, government agencies, financial institutions, embassies, etc.; health and safety: industrial plant and production shop, gas station, gas stations, hospitals, etc. 1. Conference room, autitoriums, law court, library, exam room, school, cinema, theater, and hospital, etc. 2. Oil Station, gas filled station, oil field, oil depot, etc. 3. At places where using mobile phone is prohibited such as government, military, finance, security, police and command center, etc. 4. Channel types can efficiently provide shield for mobile signals from CDMA, GSM, DCS and PHS. Function : 1.4-Channel type can efficiently provide shield for mobile signals from CDMA, GSM, DCSú¼3Gú¼WCDMA and CDMA2000. 2. It only shields the signals from mobile phone and does not affect the normal operation of other electronic devices. 3. Switching on, it can work stably for a long time. 5. Slow start-up circuit can avoid sparkling caused by mechanical switch. Power Consumption :36W Size : 251*140*52MM Power supply: AC: 110-240V DC: 4.2V 8A Jaming Range :2-50(diameter) meters (according to the mobile operatorsí» signal condition ) Work Temperatureú¦-40degree to +55 degree