... :1. Sirf3 GPS module (20 channels)2. Support GSM/GPRS (850/900/1800/1900MHz)3. Inbuilt Backup Battery ... ExtendOutput I/O1 port (Control car engine)Microphone3.5mm Single trackearphone3.5mmCurrentStandby Current:16mAworking Current:60~150mACharging current: ... about 3.5 hours)Accessoriesdevice, Connecting cable ,GPS antenna ,GSM antenna, Engine controller, SOS button, MicrophonePorts:RES: Reset Button1 ...