UM552 GPS Tracker

The UM552 is a heavy-duty wired GPS tracker designed for vehicles, fleets, and assets requiring real-time location monitoring, two-way communication, and advanced security features. With its 9-pin interface, the UM552 supports SOS emergency buttons, external microphones, and speakers, transforming it from a simple tracker into a full fleet communication and safety system. Two Way Calling + Engine shut off  + SOS Alarm + (external microphone) UM552 Working Based on existing GSM/GPRS network and GPS satellites, this product can locate and monitor any remote targets by SMS or GPRS  Application 1.Vehicle rental / Fleet management etc 2.Protect wealth etc 3.Provide peace-of-mind for businessmen 4.Manage personnel  GT06 GPS Tracker Main Function 1.GSM quad-band frequency;2.Real time tracking by SMS/GPRS;3.Remote voice monitoring;5.Overspeed alarm/ SOS alarm ;6.ACC anti-theft alarm ;7.Built-in backup battery to realize power failure alarm;8.Cut vehicle oil or circuit.9.Two way voice speak