Function detail 1.SD card:Inserts and take out to read the card to be convenient,there are the better performance of quakeproof and against high temperature than Hard disk.and its storage Up to 32GB recording capacity.So SD Card Vehicle DVR will become a trend. 2.storage size: 16G SD card can store about 30 hours recently video recording of passenger in-out at vehicle .32GB could store about 70 hours ,has the more capacity. 3.Vehicle Black Box:Similar plane flight recorder,Video frequency can add the travel speed of Vehicle,and brake signal,Built-in time and date and Car license plate number. 4.Support set Video recording mode:It can provide six kinds of video one:Fixed time video two:24Hour video Three:Ignition video four:Switch gate video five:Close-down time delay video six:Switch gate 5.Sound synchronized recording:External connection monitor microphone,the synchronizing of image and sound save in the SD card.