Portable Cellular Phone Breaker jammer output 2900 mw and has a range of up to 20 meters in the right conditions. It is supplied with a universal power supply and rechargeable battery, Li Battery AC110V/220V-DC12V/ 2500mA/h. This Jammers is used Continues for 180 minutes typically used by the police and military to control or disrupt communication during hostage situations and bomb threats.