1 Summary Working Based on existing GSM/GPRS network and GPS satellites, this product can locate and monitor any remote targets by SMS or GPRS. 2 Applications Vehicle rental / Fleet management etc Protect child / the old / the disabled / pet etc Provide peace-of-mind for businessmen Manage personnel Track criminals secretly 3 Content Specs. Dim. 52mm x 46mm x 25mm Weight 50g Network GSM/GPRS Band 850/1800/1900Mhz or 900/1800/1900Mhz or 850/900/1800/1900 GPS chip SIRF3 chip GSM/GPRS module Siemens MC55 or Siemens MC56 or Simcom300 or Simcom340 GPS sensitivity -159dBm GPS accuracy 5m Time To First Fix Cold status 45s Warm status 35s Hot status 1s Car charger 12—24V input 5V output Wall charger 110-220V input 5V output Battery Chargeable changeable 3.7V 800mAh Li-ion battery Standby 48hours Storage Temp. -40°C to +85°C Operation Temp. -20°C to +55°C Humidity 5%--95% non-condensing