Features: Positioning accuracy, security & strong. To achieve fast positioning, alarm powerfully. Directly insert into the vehicle OBD interface to work, simple & quick, will not damage the car circuit. Specification: Color Black Weight 103g Material Plastic+metal Fit for Most kinds of cars GSM850/900/1800/1900 Quad band GPRSClass 12, TCP/IPWorking Voltage 9-50DCWor King Current 22m A (12V DC), 12m A (24V DC) Gos Locating Time Cold Start = 38s (Open sky) Warm Start = 32s Hot Start = 2s (open sky)GPS Precision 10m (2D RM) Working Humidity 20%-80%RHSize GPS 7.5cm*5cm*2.5cm, slot 1.8cm*2.7cm Note: If you want to get the user manual, please click Here. Package Included:1 X Tracking Device 1 X Instruction