Brief: Based on the GPS satellites and GSM(850/900/1800/1900MHZ),and by message,internet or PDA, it can track and position various remote targets.Locate precisely, Be widely applied in safeguarding vehicle,old,child,Pet,and managing personel; Track covertly etc. Advantage: 1. Locate conveniently: withour positioning platform; locate by SMS,internet or PDA with a free positioning server or a map software; And our products can be made to be compatible with a positioning platform as well. 2. Slim, self-contained (built-in antenna and battery) , easy to carry and hide. 3. Low power consumption, long standby of 3-15 days (depend on the working mode). Standard Configuration: 1. Support working without a positioning platform. 2. Automatically locate, report the position at preset intervals// Traceable historical position geo-info. 3. Get the real-time info and manually input lati-&-longitude to position. 4. Low battery alert, emergency alert, vibration alert. 5. Report the last location when entering a place without GPS signals, i.e. underground parking. 6. Covert alert, remote listening-in. 7. Power and signal indicator 8. Automatically start the power saving mode at idle state. 9. Geo-fence: restrict the movements within district. 10. Listen in to & talk with a fixed number. Application: 1. Used in vehicle rental, outer equipment etc. 2. Monitor and protect the child, old, disabled, pet etc. 3. Provide peace-of-mind for businessmen. 4. Manage on-errand personnel. 5. Track criminals. Specs. Content Specs. Dim.: 85mm x 63mm x 25mm(3.3ö*2.5ö*0.98ö) 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: Simcom300 or Simcom340 GPS sensitivity: -159dBm GPS accuracy: 5m Time To First Fix: Cold status 45s Warm status 35s Hot status 1s Work voltage: 10Vù36V Battery: Chargeable changeable 3.7Vá1500mAh Li-ion battery Standby: 48hours Storage Temp.: -40¦C to +85¦C Operation Temp.: -20¦C to +55¦C Humidity: 5%--95% non-condensing. packaging measurement:39.5*29.5*27.5cm， per box have twenty units,the weight is 13KG. we have stardand cartons for 10,20,30PCS.