Emergency Event Protection
This devie has the G-sensor automatic collision detection，
to start the file Write-protect function，Also provides user manual
touch emergency protection；pressing this function while
recording，the key graphics will appear at the top left corner of
the screen the key graphics will appear, emergency protection
file length is the length of the current recording file plus 30
seconds recording file length after triggering the protection
function , protect the files not being overwritten
by the loop recording function，the files will be saved in the SD
card to the separated "CRASH" folder. (as the below image)
