... . signal real time location tracking3. GPRS location tracking via time intervalTwo-way communicationWith external speaker, tracker can receive and dial out ... ID, time, address, position validity, alarm( over-speed, SOS), vehicle status( engine, door), speed, mileage, direction, GSM signal, ... and set geo-fence area as station.2. Set geo-fence area as station and manage the in/out vehicle3. Fence type ...