... /HD1/D1 3.Linux system H.264 car DVR 4CH vehicle MDVR Target users:High profile high performance 4 channel dvr ... installed in the bus ,coach,logistics vehicle,freight vehicle,police car ,taxi,private car,money vehicle,fire truck,ambulance car,car team, etcfor ... detection / timer switch / alarm recording 10) Sensors & Alarm 11) Record vehicle speed and car ID synchronization with video and audio 12 ...