... I/O5 I/O Port1 port use to check the engine ( ACC check)1 port use to SOSThree ports ... use to ExtendOutput I/O1 port (Control car engine)Microphone3.5mm Single trackearphone3.5mmCurrentStandby Current:16mAworking Current:60~150mACharging ... 5 hours)AccessoriesDevice, Connecting cable ,GPS antenna ,GSM antenna, Engine controller, SOS button, MicrophoneCircuit Diagram:GPS Tracking System(Software)1 ...