... center via internetMain functions of GPS tracker with navigation: 1. Free GPS tracking2. GPS Navigation3. GSM(GPRS) Wireless Communication4. Take Photo5 ... time is about 3.5 hours)AccessoriesDevice, Connecting cable ,GPS antenna ,GSM antenna, Engine controller, SOS button, Microphone, Camera, ... accept OEM and customised orders.(logo, functions, language) Gsm Gps Tracking Device With Free Software