Pocket Mobile Phone Signal Jammer: JM-110A TX Frequency: 850-960MHz,1805-1990MHz,2110-2170MHz Jamming Radius: Up to8 meters (1-8Mdepending onthe background signal strength and area situation) Available system: GPRS,GSM,DCS,CDMA,PDC,TDMA,PHS,PCS,IDEN,W-CDMA,UMTS Output Power: 0.6W Battery: Built-in Rechargeable Battery DC5V/1100mAH, Working Time 150 minutes. Power Supply: Power Adaptor(AC100-240V, 50/60Hz) and Car Cigarette Charger Dimension:95×48×18 mm Interface: Packing: