It can be applied at meeting room, conference room, museum, gallery, Theatre, concert hall, church, temple, restaurant, classroom, training center, Factory, bank, train, bus, etc. For some locations of special purpose such as Hospital, gas station, etc., please do field test first to make sure no Interference happened to the normal operation of their equipment and Instrument. It's easy to install and operate the device. Specifications: Isolation signal frequency: CDMA: 869-894MHZ GSM: 920-960MHZ DCS: 1805-1850MHZ PHS: 1900-1980MHZ 3G: 2110-2170MHZ Power supply: AC adapter Shielding Radius: Shielding Radius: (20-50) meters, -75dBm Rules of Installation: UL (E190582) CSA (LR 112971 Level 3) Remote control: Can up and down the power, Can open and close the Jammer Dimension: 233*33*106mm Working time: Without the time limit, May continue to work.