_x005F_x000D_ GSM and GPRS technology. is designed for use in any vehicle to track their location, such as caravans, boats, motor homes, trucks,for vans 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. Specifications: Size: 43.2 x 32 x 13.6 mm Weight: 30g Connection: GSM / GPRS GSM Frequency: 850/900/1800/1900 MHz Charger Input: AC110-220V 50/60 Hz Charger Output: DC5V 500mA Battery: Rechargeable battery 3.7V 500mA Li-ion battery Storage Temperature: -40 to 80 degrees Working Temperature: -20 to 55 degrees Accuracy of positioning: 100M-1000M Hunidity: 5%-95% non-condensing How 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 device (E.G. free PAYG SIM card from O2 etc) 2 .Conceal the device where it cant be seen... 3. Dial the pay as you go number from your phone..... 4 .Listen - now you can hear what they are really talking about... Power 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 lettersDW SMS to the alarm in , and on aboard please edit capital letters GPSto 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 lettersSOSto alarm, directly press the key SOS above three seconds after the success of seting,