Sheng Jay Automation Technologies SJ-V21, Quick Manual

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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)
G-Sensor gravity sensor: automatically detects vehicles collisions a
nd forced protect files
In the system set up > in video options, G-sensor
(accelerometer) sensitivity set default value to "middle"
(which means in activate and normal sensitivity), the actual
effects are as follows:
(1) automatically record emergency events , log files , file
protection function as the previous statement.