Action Camera AC32 User Manual page 21

Select from 30 min, 1 hr or custom.
If you select 30 min，the ride recording will last for 30 minutes
and stop automatically once it reaches 30 minutes.
If you select 1 hr，the ride recording will last for 1hour and stop
automatically once it reaches 1hour.
Select "custom" to define your desired preset time. Each time
you press the Left button , the value will be decreased by ten
minutes, while each time you press the Right button , the value
will be increased by ten minutes.
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