Product Name: Mini Jammer /GSM Jammer/Handheld Jammer/Prison Jammer (GW-JM3) Model NO.: GW-JM3 Jamming Range(Radius): 1-5m (Depend on Local Signal Intensity) Trademark: Greetwin Transport Package: Neutral Packing Specification: ISO9001 Origin: Shenzhen HS Code: 8517699000 Product Description Mini Jammer /GSM Jammer/Handheld Jammer/Prison Jammer (GW-JM3)Features:1. Pocket-sized and portable design2. ON/OFF switch make it more user-friendly3. Rechargeable battery and car charger4. Three channels with different frequency range,Or customize other cellular standard in the world.Such as GPRS, iDEN, GPS, UMTS.Application:GPS tracking device, Private offices, vehicles, Oil and Gas Storage Facilities and fields, Hospitals, Theatres, Recording Studios, Banks, Tendering Rooms,Churches, Conference Rooms, Classrooms, Testing Facilities, Security Services,Military, Secret Services, Libraries, Museums, Prisons, Courts, Border PatrolAnd Drug Enforcement, Customs, House, Small meeting Room, etc.Package Included:1pc Mini Mobile Phone Jammer1pc Power Adapter (100-240V)1pc Car Charger1pc ManualOutput portFrequencyAverage output powerChannel output powerCDMA/GSM851-894MHz300mw1dBm/30KHz(min)925-960MHzDCS/PCS1805-1880MHz300mw1dBm/30KHz(min)1930-1990MHz3G/GPS2110-2170MHz300mw1dBm/30KHz(min)1575MHzPower supply: AC110-240V,DC 12V/2A Built-in battery: 1500mA/hDimension: 95*45*18mm Weight: 300g 3pcs External omni antennas Output power: 0.9wWork time: 1-2 hours Running temperature: -10 to +55'CJamming range(radius): 1-5m (Depend on local signal intensity)