Thanks for your attention! ! There are fine kinds of DZ-101D series high power jammer, such as: *DZ-101D-A(80W) *DZ-101D-B(160W) *DZ-101D-C(240W) *DZ-101D-D(80W) *DZ-101D-E(480W) Today we would like to introduce our Signal Jammer DZ-101D-E. 1. TX-Frequency: (A)TX-Frequency: 880MHz (B)TX-Frequency: 900MHz (C)TX-Frequency: 1800MHz (D)Tx-Frequency: 1900MHz Available Systerm: GSM, CDMA, DCS, PCS and PHS 2. Total Output Power: 480w 3. valid jammer diameter: 250-500 meters: 4. Power supply: AC110V or AC220V 5. Antenna: 2pcs 65 degrees directional panel antennas 6. worktime: It can work stably for long time Welcome t ocontact us for more deatail information ,thanks for you business opporunity. Bill Hong 8613418543724 asiconbill(AT)hotmail.com