GSM/GPS/GPRS Car Alarm Functions and Features > Dual location: locate your vehicle through both GPS positioning and GSM base station >Dual Date Report Mode: Alert and GPS date report by GSM SMS and/or by GPRS > No distance limit to control your cars by any Voice reminder or SMS. > Emergency stop : engine On/Off the car by SMS and voice operation. > With backup battery: after Power Failure Alert, it will supply power > Door auto-lock and auto-armed function > Support alert report: Engine-on alert SOS alert(Hijack Alert) Power failure alert Move alert > Support :date report: GPS Periodical Report Route-points Report ( passing fixed points report) Fixed Distance Report GEO alarm (over range report) Over Speed Limit Alarm Technical Specification > GSM Work Frequency850 /900 /1800 /1900MHz (Optional) > Temperature: Working Temp -20°c +60°c > Humidity: 20 95% > GSM Antenna Cable type: Gain:3dBi cable-length:3-5meters connector :SMA Portable antenna: Gain:2dBi height: 5cm connector: SMA > GPS Antenna: Voltage:3V cable-length: 3-5 meters connector: SMA > Mainframe Power supply: 12/24V DC > Backup battery: Poly-Li battery, 950MAh 3.7V > Mainframe Dimension: 110*64*25mm > Weight: G.W.:0.5Kg/set including accessories Package dimension210*143*40mm Accessories 1. Main Unit 2. GSM antenna 3. GPS antenna 4. SOS-button 5. Stop-relay 6. 6-Pin connecting wires