Mobile Phone/Cellular Phone CDMA800 GSM900 DCS/PHS/GSM1800-1900 3G Signal Jammer/Shield/Isolator/Blocker: iS-101A Specification Frequency Band CDMA800 (850-894MHz) DCS/PHS/GSM1800-1900 (1805-1990MHz) GSM900 (925-960MHz) 3G (2110-2170MHz) Total Power: 10 watt Power Supply AC:110/220 V DC 12V, Electric Current: 3A Power Consumption: 36 watt Shielding Radius: Up to 40 meters, signal strength