Introducing the powerful Portable Cellular Phone Breaker jammer for all worldwide networks. These are very highly powered pocket sized cell phone jammers that will disable all cell phones in all countries.This jammer has output of 900 mw and has a range of 5~15 meters in the right conditions. It is supplied with a universal power supply and rechargeable battery. This is the most powerful handheld on the market. This Jammers are typically used by the police and military to control or disrupt communication during hostage situations and bomb threats. Features and Specifications ? Tx Frequency: 851~960Mhz, 1805~1990MHz, 2100~2170MH ? Battery: Ni-H DC12V/1600mA/h, ? Continue Using Time: 90 minutes ? Dimension: 110mm(H)x62mm(L)x30mm(D) ? Jamming range: Radius 5~15 Meters (Signal=-85dBm)