This jammer is specially used in all kind of vehicles where the driver/operator should not be disturbed by phone calls.
Single band GSM900/1800/800/1900/3G
Works on 12 or 24 volts DC, directly connected to the battery of the vehicle.

Key features
1.2 frequency bands: GSM 900 / GSM 1800/1900/800/3G
2.Directly connected to the vehicle's battery

General specifications
1.Range : 1 to 2 meters (Just Jamming driver)
2.Dimensions : 63mm*48mm*12mm
3.Weight : 150g
4.Power supply: 12V / 24V
5.internal antennas
6.1 year warranty

Applications
Cranes, trucks, buses, all kind of vehicles etc