... Data Manager 4 Channels Dual SD Card Vehicles Mobile Digital Video Recorder DVR vehicle drive recorder dvr 4-ch ... digital video recorder dvr Descriptions:4 Audio &Video+ GPS+3G/WIFI ... SENSOR+GPS+3G (EVDO)+WIFIApplications:Buses, cars, coaches, cash carriers, industrial vehicles, taxi, investigation vehicles, military trucks, police vehicles, ambulances, ...