Blaupunkt CR16WH Owner's Manual page 6

CR16
Power on clock radio
Insert the AC/DC adaptor to any 230V AC household outlet. Then insert the DC jack to the back
side of your unit. Your clock radio will be powered on and ready to work for you.
Back up battery installation
Your clock radio requires 1 x CR2032 lithium battery (not included) to provide backup power
to the clock in the event of a temporary power interruption.
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