This is all that I see as far as the clock display, probably the same as yours.
3.Screen Display:
After switch on, the OLED displays voltage resistance, battery level, temperature, output wattage etc. The display will change to Real Time Clock after 10 seconds if unused and the Real Time Clock will be shut off after 15 minutes if unused. Press “+” or “-“ or Mode button once and the screen will be lit with Real Time Clock display and press “+” or “-“ or Mode button again, the screen will be lit with main manual. Press the fire button at any time, the screen will be lit with main manual.
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