ASA Electronics AVT-1928 - Manual (Page 19)

3. Press the VOL button to set the hours (including AM/PM); press the VOL button to set
the minutes. If you hold down either VOL button, the corresponding numbers will change
more quickly.
4. When the setting is correct, use the CH buttons to select another timer function, or use
the MENU button to exit this menu.
Canceling the On Timer or Off Timer