Http://www.Jammergroup.Com Product description If you feel that there are too many people bothering you with their aimless phone talks in public, or when you are going on a very important conversation, you won¡¯t to be any bothered, or you really need silenced surroundings. For those purposes the portable blocker is you best choice. T the device can be used in car directly, that means it can work constantly from the car power. This is a great solution for such places like meeting room, security services, churches, classrooms, libraries, museums, houses and cars. All above, the jammer is best choice for you. At a glance: This product can be used in any place where mobile phones and wifi are prohibited to be used! Cover interface standards: cell phone signal (cdma, gsm, dcs, 3g), wifi (2400-2500mhz) Could be used in car directly with car charger Total output power: 2w Effective range: radius up to 20 meters Specifications: Affected frequency ranges: Europe and middle east market -wifi: 2400-2500 mhz -gsm900: 925-960 mhz -gsm1800: 1805-1880 mhz -3g: 2110-2170 mhz American and asia market -wifi: 2400-2500 mhz -cdma gsm: 850-960 mhz -dcs phs: 1805-1990 mhz -3g: 2110-2170mhz Total output power: 2w Jamming range:up to 20m, the jamming radius still depends on the strength signal in given area External omni-directional antennas all the tx frequency covered down link only Power supply: 50 to 60hz, 100 to 240v ac With ac adapter (ac100-240v-dc12v), 2000ma/h battery Continue using time:around 90 minutes Dimension: 104x53x33mm (not included antenna) Box