... CD-808, This product is with GPS module and GSM module, It has many new and unique functions, ... is OFF, install the battery in or connect the power wire to 12V or 24V, the tracker will power on ... (Our free tracking platform)- SIMCOM GSM module (4 frequency) & Taiwan GPS module (Sirf-star or MTK chipset)- GSM ... After go out the under ground park, some tracking will lost, the GSM and GPS module will take a ...