Well-Goal GPS Tracker TK06A with Free Monitor GPS Tracker Software Mini GPS Tracker Build in MIC GSM quad-band frequency for globe use;Real time tracking location by SMS/GPRS. Connect external relay to realize controlling oil and circuit of the vehicle(optional). Built-in backup battery to realize power failure alarm(optional). Working Based on existing GSM/GPRS network and GPS satellites, this product can locate and monitor any remote targets by SMS or GPRS. Real time voice monitoring function ;Recover original password.