Sangean WFT-1Di Manual page 40

Set 12/24 Hour
/4 hour setup allows you to change the clock display format.
● To setup the auto update go to > System settings > Time/Date >
Set format, and choose  hour or 4 hour display.
Set Sleep Time
Sleep time allows you to set the time to turn the radio off automatically.
Press the Timer button on the radio. And the radio will enter the Set
Sleep time mode. While the display still showing as the picture, rotate
the Tuning Knob to adjust between off, 5 minutes, 30 minutes, 45 min-
utes, and 60 minutes.
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