Setting the time is usually done while the unit is in (radio turned off).
Press the ALARM button again to toggle between "Buzz" (buzzer) or "Radio". Audiosonic Caa-09169 Clock Radio Manual WORK
Open the battery compartment on the bottom to install a backup battery (typically a 9V or CR2032, depending on the revision). This ensures your settings are saved during a power outage. Setting the Clock Time Setting the time is usually done while the