We are professiona Manufacturer On Mobile phone signal Jammer / isolator / breaker, cellphone blocker, detector, booster, etc. This model have wireless remote control, so you can adjust the distance as you want, very convenient for you to use. The moblie phone signal isolator will make effect only on the communication of moblie phones, instead of on other electronic devices and human bodies. Main Functions: 1. 4-Channel type can efficiently provide shield for mobile signals from CDMA, GSM, DCS and PHS. 2. It only shields the signals from mobile phone and does not affect the normal operation of other electronic devices. 3. Generally, please use your moblie phone at the places more than 200 meters away from the base station. 4. Switching on, it can work stably for a long time. 5. Slow start-up circuit can avoid sparkling caused by mechanical switch. Widely used: 1. Conference room, autitoriums, law court, library, exam room, school, cinema, theater, and hospital, etc. 2. Oil Station, gas filled station, oil field, oildepot, 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. Features: 1. The mobile phone signal jammer is made up of up-to-date paste components and integrated circuits. With advanced performance, it is easy to install and use, and can work continuously for a long time. 2. As the manufacturing process strictly follows ISO9001 quality system, the device works stable and reliable. It is an ideal, reliable security product, which can be used to strengthen information security, and protect safe production and protect the environment at the same time. Technical Parameters: Effective Isolating/shielding diameter: 40 ~50 meters. Isolating signal bandwidth are: CDMA: 869-89MHZ, GSM: 925-960MHZ, DCS: 1805-1880MHZ, PHS: 1990-1990MHZ. Suitable for Europe, Africa, Asia, Middle East, etc. Working time: It can work stably for a long time. Environment temperature: -40degree to +55 degree. Relative humidity: -30%- 95%. Power Adapter: Input AC160V-240V, Output DC 5V. It's easy to set and use, no software, no tr