Roberts Radio RD-22 - Manual (Page 28)

Display backlight
1. The display backlight will illuminate when your radio is switched on
and dim to about one tenth of the full brightness when your radio is in
standby mode.
Clock display
1. Your radio will display clock time when it is set to Standby mode.
2. During Standby mode the clock will receive updates from the last
station tuned to before entering Standby mode.
When in Standby mode your radio's clock will automatically track
Summer\Winter time changes.
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