Frequency A--All cellular signal. CDMA800:850-894mhz GSM900:925-960 mhz, GSM1800:1805-1880mhz, GSM1900:1920-1990mhz 3G: 2110-2170mhz, Frequency b--europe cellular phone+gps+wifi. Gsm900:925-960 mhz, Gsm1800:1805-1880mhz, 3g: 2110-2170mhz, Gps l1:1500-1600mhz, Wifi:2400-2500mhz Frequency c--america cellular phone+gps+wifi. Cdma800:850-894mhz Gsm1900:1920-1990mhz 3g: 2110-2170mhz, Gps l1:1500-1600mhz, Wifi:2400-2500mhz. You can select any one of above frequency bands you need in a jammer, and we also provide odm&oem service. Total output power: 12w Jamming range: radius up to 40m, the jamming radius still depends on the strength signal in given area Adjustable output power, each band can be controlled separately and simulatneously. Working time: may continue to work 24/ 7 External omni directional antennas All the tx frequency covered down link only. Dimension :( l * w* h): 200*165*60mm. Full set weight: 2.8kg.