Cover interface standards: Digital :GPS L1,GPS L2 Total output power: 2.7Watt Frequency: 1164Mhz and 1563Mhz Global Gps and Glonass system Signal Source PLL synthesized Antennas External Omnidirectional Every band frequency can select output power All the TX frequency covered down link only. Battery: Ni-Mh battery DC12V/1600mA/h Work time: 90 minutes Support Powered by car cigarette charger Automatic power switching power supply: 50 / 60 Hz / AC 100 ~ 240V Humidity: 5%-80% Can OEM or ODM for specially request Effective range: Up to 20 Meters radius, the signal must