a drive recorder -- it is an application.
Usage is very easy.
Click a start button.
When there is a shock (or screen touch) it is the end of recording.
Click a play button.
The front is recorded for back about 3 seconds for about 30 seconds from the time of there being a shock (or screen touch).
Five steps of sensitivity of a shock can be adjusted.
Reverse reproduction and top sending can be performed.
Arbitrary pictures can be saved by a JPG file.
(Preservation clicks a capture button)