... wireless image transmission. Product functions:1. Signal detecting and control: 13 routes signal sensor, 17 vehicle status detecting, ... -defined backup output control. 2. Alarm: 19 alarms, 3 modes of alarm . 3. Monitoring: vehicle automatic tracking/monitoring, region setting, geo ... entry/exit station report…5. Voice and phone call: hands free phone, remote listen in, voice reminds device, TTS voice ...