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 videos through ... for speedAlarm Input4Ch,5V@10mAAlarm Output2Ch,1A@110VRecord modeContinuous, Cycle, Schedule, Alarm, Motion detectionVideo search method By Channel, time, record time ...