1Wide Application: The black shell is easy to hide and is very suitable for tracking cars, trucks, teenagers, spouses, seniors or assets. 2High Positional Accuracy: Builtin GSM antenna, 850/900/1800/1900 MHZ GSM frequency; 159 dBm GPS sensitivity, real time tracking at intervals. 3Multifunction: Resend data from signal dead zone; GPS inflection point supplementary transmission; APN adaptive status query; Low power alarm. 4Driver and Vehicle Alerts: Overspeed alarm; Geofence alarm; Vibration alarm; Power failure alarm; History playback. 5OBD Port: No battery needed, powered by OBD. Locate Loved ones'phones instantly when they're walking, biking, or on public transit. Item Type:Car Tracking Device Material: ABS GSM Module: RDA8955 GSM Frequency: 850/900/1800/1900 MHZ LBS Positioning Accuracy: 100-500 meters Built-in GSM antenna Battery: Lithium polymer battery 80mAh (included) GPS Chipset: ForU-blox 7020 GPS Sensitivity: 159 dBm GPS Frequency L1: 1575.42 MHZ Channel 35 channel check track GPS Positioning Accuracy: 5-10m, 2D RMS Speed Accuracy: 0.1m/s Time accuracy is synchronized with GPS GPS Data: WGS-84 Hot Start:1 xOBD Tracking Device