1. GPS car/motorcycle positioning, etc 2. Universal in the world; 3. GSM /GPRS modem supports four frequency bands, i.e. 850/900/1800/1900MHz 4. High-sensitivity, new workmanship and the most advanced GPS chip; 5. Can accurately position even if with weak signals; 6. Can work effectively in limited space such as the remote and narrow places in a city; 7. Low energy consumption; 8. Fast signal capturing; 9. Supports single positioning and continuous tracking; 10. Supports alarming and remote monitoring; 11. Supports the location information inquiry by SMS and Internet 12. May monitor without disturbing the tracked person and realizes real-time tracking; 13. Can position the holder by call or mobile phone SMS;