GPS tracker is designed for advanced tracking/monitoring specifically for vehicle tracking using GPS， GSM and GPRS technology. The GPS tracker is designed for use in any vehicle to track their location， such as caravans， boats， motor homes， trucks， and construction machinery and many more - live tracking possibilities are limitless. This is particularly useful if your vehicle， pets， child or your belongings have been stolen. Time to enjoy the benefits this GPS tracker brings!Specifications:Size: 43.2 x 32 x 13.6 mmWeight: 30gConnection: GSM / GPRSGSM Frequency: 850/900/1800/1900 MHzCharger Input: AC110-220V 50/60 HzCharger Output: DC5V 500mABattery: Rechargeable battery 3.7V 500mA Li-ion batteryStorage Temperature: -40 to 80 degreesWorking Temperature: -20 to 55 degreesAccuracy of positioning: 100M-1000MHunidity: 5%-95% non-condensingHow does it work:It's simple. Your surveillance operation will be underway in 4 simple steps:1. Insert a mobile phone SIM card in the device2. Conceal the device where it cant be seen3. Dial the pay as you go number from your phone4. Listen - now you can hear what they are really talking aboutPower on: open the back cover， put the SIM card into the seats， then it is automatically power on. When booting， indicator will light for 10 seconds， after the indicator is off， cover the back cover then it can be used.Environmental monitoring: starting up normally， dial alarm number， it will be easy to hear the situation within 10 miters around the machine after waiting for five seconds.Sound control dialing: use mobile phones or fixed-line to get through SIM card number in the alarm， hang up the machine when hearing the sound of the machine about 3 seconds， and that means it sets up successfully. When there is a sound above 45 db within 10 miters around the alarm， the call will be automatically make call number which you set before.Send 0000 SMS to turn off sound control function.Send 1111 SMS to turn on sound control function.LBS positioning: please directly edit capital letters“DW” SMS to the alarm in China， and on aboard please edit capital letters “GPS”to the alarm，The alarm will revert a message including the information about addresses/longitude and latitude/web site content in a minute.SOS Emergency call: Edit the content of messages capital letters“SOS”to alarm， directly press the key SOS above three seconds after the success of seting， the alarm will directly call the seting number. And the indicator will flash.Package Includes:1 x Mini Global Tracker1 x User Manual1 x USB Cable