VEVOR R1-RXR02-N7-3-01 Mode D'emploi page 22

8.Celsius (℃)/Fahrenheit (℉) switching operation:
Within 30 seconds after powering on, press the two buttons
(SLUSH+FROZEN JUICE ) at the same time for 2 seconds to switch the
temperature between Celsius and Fahrenheit. When switching, "C" will be
displayed for 3 seconds, indicating that the Celsius system has been
entered, and "F" will be displayed for 3 seconds, indicating that the
Fahrenheit system has been entered.
Circuit Diagram
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