1) 4CH D1 Car CCTV DVR 2) HDD,SD Card, USB for storage 3) ... is the world’s first 4-channel D1 vehicle DVR with multiple functions. It boasts a high-speed processor ... storage media, to realize 4-channel D1 capturing of HD videos, recording of driving information, and unloading of ... ignition is off.8. Automatic, event trigger, schedule or motion recording options.9. Can record speed with audio and video ...