Install this tracker in a car (truck or any vehicles) to follow its very moves. Not only will you get the real time accurate position of the car (logitude, latitude in addition to speed, etc ...) but you also gain control over it through SMSs! Imagine your car gets stolen. All you have to do is send a specific SMS to ... stop the engine!You may also set up boundaries, speed limits and receive alerts when any of those limits has been exceeded. The trackers works on GSM/GPRS networks and is quad band - thus working pretty much anywhere on the globe. It has a micro, which enables you to secretly listen to what is going on inside the car - depending on where you put the device - without anyone noticing.To summarize, your cellphone is permanently connected to the tracker, which enables you to control the vehicle and know where it is - a link is sent to you to visualize its position.Easy to install, easy to use, this can be particularly useful for professionals, such as car rental companies, or delivery companies. Please be aware that in some countries, this type of devices may not be permitted. It is the buyer's sole responsibility to check whether they can purchase and import those products.Specifications:SIRF III chipGSM/GPRS module: Simcom Sim340GSM Frequency: 850 / 900 / 1800 / 1900Sensitivity: -159 dBMAccuracy: 5 MFix:-Cold status: 45s-Warm status: 35s-Hot status: 1sPower: 12V car batteryBackup: rechargeable 1000mAh Li-ion batteryWorking temperature: -20 to 55 degrees CelsiusLimits: Altitude: 18000 metersVelocity: 515 metersAcceleration: less than 4gColor: BlackDimensions: 103 x 54 x 34 mmPlease note that the SIM card should be 2G, 2.5G or 2.75G only. There should be no PIN code.Accessories:GPS and GSM antennasMicrophoneWiringCD