... alarm function, security 4. send the data SMS/GPRS Applications:·GPS Vehicle Tracking ·Vehicle Security/Recover/Anti-hijacking · ... Lithium batteryDC 3.7V-4.2VExterior GSM antennaReceive GSM Signal betterExterior GPS antennaReceive GPS signal betterPower Consumption Active mode(avg.)< ... inputs ), 2 digital outputs, 2 analog inputs auto GPS /GSM/GPRS/AGPS tracker, engine on& off, geo-fence control,over ...