1. Worldwide bands available 2. 2G GSM, quadband.  3. High-sensitivity, latest technology, and the most advanced GPS chip  4. Can accurately position even if with a weak signal  5. Can work effectively in limited spaces such as the remote and narrow places   6. Compact size, easy for hiding  7. Low energy consumption  8. Fast signal capturing  9. Supports two modes: text message polling and GPRS trace tracking  10. Alarm function  11. Cut oil or circuit (an extra relay included )  12. Overspeed alarm  13. Acc ignition detection  14. Vibration alarm  15. Sleep model

16. SOS (an extra SOS button included)

17. Remote monitoring by voice (an extra microphone included), two ways communication for option.

18. Broadband Voltage: 9V-75V