Our Cell Phone Jammers are designed to counter the contingencies effectively, by jamming the cell phone signals with transmission of signals of adequate strength in the operating frequencies of CDMA, GSM and extended GSM Bands. They are ideally suitable for avoiding external distraction in Conference Halls. Hospitals, Libraries etc., for dealing with subversive activities effectively and for safety of major installations. Output Power: 10W Coverage 15 - 20 Meters, as Diameter Input AC Voltage 220V AC, 50Hz Internal DC Supply Voltage 12/ 24 Volts Reversed Voltage Protection Built-in Weight 1.6 Kgs. (Approx.) Dimensions (in mm) 238 x 186 x 53 mm