Functions
1. Single satellite positioning lookup
2. Continuous satellite positioning lookup
3. Emergency call and position notification
4. Tow-away Alarm
5. System self-diagnosis notification
6. Alarm feedback (by text message)
7. Weak current feedback to car owner
8. Automatic power save mode
9. Position report by text message
10. Position report by full automatic traffic control center
11. Position lookup through Internet
12. Power-off feedback to car owner
13. Automatically detect and report car conditioner daily
14. Speed Limit alarm setup