Panasonic RF3700EG - Manual (Page 21)

The unit can be automatically turned off
after the desired duration of Operation.
(60, 45, 30 or 15 minutes)
Press SLEEP to select the length of
time you should like the unit to
play.
Each time SLEEP is pressed, display will
change as follows in turn.
The display return to show the broadcast
frequency about 10 seconds later.
To confirm the time remaining
on the sleep timer
Press SLEEP.
The display will show the time remaining
for about 10 seconds.
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