Summary function: Working Based on existing GSM/GPRS network and GPS Satellites, these products can locate and monitor any remote targets by SMS or GPRS. Positioning and Tracking: Through the on-line Positioning Platform or the cell phone to locates at times, and get the working status. You can choose the Positioning Platform by yourself. Triggering Emergency Alarm: When there is a emergency happened on the vehicle, you can put on the button and the installed unit will send out alarm to the authorized numbers. Remote controlling oil and circuit: You can control the oil and circuit via the unit by SMS in anywhere and anytime. Remote Monitoring : In anywhere and anytime, call the phone number in the unit, when it connects, you can monitor the sound around 5 meter. Movement Alert : Send the SMS to the unit to start the movement alert function. When the vehicle is moving, the unit will send the movement alert to all authorized numbers. Overspeed Alert : Send the SMS to the unit to start the movement alert function. When the vehicle is overspeed, the unit will send the overspeed alert to all authorized numbers. Geo-fence : Set up a geo-fence for the unit to restrict its movements within a district. The unit will send the message to all authorized numbers when it breaches the district. The unit : Send SMS to resume the default of unit. Auto Track : You can set up auto track by SMS or on-line positioning platform. Mileage statistics: ACC checking; cutting off power and alarm. Compatible with the original anti-theft alarm: It will send SMS alarm after the original anti-theft alarm warning. Technical Specifications Of GPS Vehicle Tracker HTS 100 Specifications: Dim. 85mm x 63mm x 25mm(3.3”*2.5”*0.98”) Weight: 160g Network: GSM/GPRS/GPS Band: 850/1800/1900Mhz or 900/1800/1900Mhz or 850/900/1800/1900 GPS chip: SIRF3 chip GSM/GPRS Module: Simcom900B GPS sensitivity: -159dBm Time To First Fix:Time To First Fix, Cold status 45s, Warm status 35s, Hot status 1s Work voltage: 10V—36V Battery: Chargeable changeable 3.7V 1500mAh Li-ion battery Standby: 48hours Storage Temp.: -40°C to +85°C Operation Temp.: -20°C to +55°C Humidity: 5%--95% non-condensing.