Sangean WR-22 (V1) - Manual (Page 20)

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3. Rotate the Tuning control rotary until ‘RDS CT’ shown on the
display. Press the Tuning control rotary to confirm the setting.
The clock time of the radio will set up automatically according to
the RDS/ RBDS data received.
4. When the action is completed, the RDS/ RBDS icon will appear
on the LCD display indicating the radio time is RDS/RBDS clock
time. The radio cock time will be valid for 2 days each time the
radio time is synchronized with RDS CT.