Product Specifications: 
Main Feature: Four Bands Handheld Cell Phone, GPS and WiFi Signal Jammer with Single-Band Control (For Worldwide all Networks), Each band can work separately or simultaneously. 
Isolating Signal Bandwidth: 
- GPS: 1500~1600MHz 
- CDMA & GSM: 850-960MHz 
- DCS (PHS)/CDMA1900: 1805-1990MHz 
- WiFi: 2400-2500MHz 

Antenna: 4 x Omni-directional Antennas 
Shielding Radius Range: Up to 15 Meters (depending on the mobile service provider's network condition and background signal strength) 
Power Source: Wall plug, car adapter, or built-in battery 
Built-in Battery: 1800mA/h 
Built-in battery time: 90 minutes 
Total output Power: 2 watt 
Operating Temperature: -10 to +50 Celsius 
Power supply: 100-240V, 12V 
Device Size: 113*60*31mm 
Package Size: 209*52*86mm 
Color: Silvery 
System: Nextel, WiFi, Bluetooth, AMPS, TACS, NMT, GSM, DCS, CDMA, PDC, TDMA, PHS, IDEN, 3G, UMTS, GPSL1 
Suitable for: Police and Meeting Room, Security Services, Military Units, Prisons, Banks, Churches, Conference Rooms, Classrooms, Secret Services, News Conference Rooms, Libraries, Museums, Customs, Houses.