* Built-in GSM mobile phone module
* Real two-way mutual response detection
* Multiple Geo-fencing alarm control
* Voice, SMS, CS data, GPRS TCP/UDP communication
* Remote configuration
* Offer unique supervision platform (HW & SW) optional
* Real time tracking (time, distance interval or intelligent mode)
* Unit password setting
* Power management
* Power low/lost alarm
* Back-up battery power low alarm
* Battery back-up capacity for more than three days
* Voice wiretapping
* Journey report wireless download.