SD-card to be stand-by.it is great HD wide-angle video quality and audio ，when car use by immediately start the engine can be video recording function, through the high definition camera photography, the image and voice of vehicle driving completely record, when accident occurs, immediately produce evidence, protect the rights of drivers themselves

Placement is critical for the interior as my interior view is partially obscured by the rearview mirror which is why the audio is so important

Audio is very clear

Much more audible and quality audio recording than my previous dash cam