Dell DJ DITTY HV04T Owner's Manual page 34

2 Scroll-select Settings & Info.
3 Scroll-select Settings.
4 Scroll-select Idle Timer. A list of available times appears.
5 Scroll-select a shutdown time.
NOTE:
Your player is "idle" when you do not press a player button and
you do not have any tracks playing during the specified duration.
Using Your Dell DJ Ditty
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