Abee R22 Car Cam Recorder User’s Manual Page 11/185.4. Sound RecordingSound Recording ItemsON: Video with sound (Default)OFF: Video with no sound5.5. Auto OffDescriptionSet the countdown length when removing external power source. The items are: 10 s, 30 s, 1 min,where 10 s is the default.5.6. MD Record TimeDescriptionSet the length of Motion Detection or turning of this function when parking. Users can set thelengh of Motion Detection in 5s, 10s, 30s and 1 min.