4CH 3G Mobile DVR for Bus, Taxi,Police cars 3G SIM card supported Back ... up videos through internet H.264 expressive 3G Mobile DVR for Bus, Taxi, Police carsFeatures:3G SIM card supportedBack up ... Channel, time, record time, storage locationText OverlayYes(plate number, time, Vehicle status)Power On modeSchedule, ignition on, delayPower Off modeSchedule, delay ...