- When the device is powered OFF, press and hold the measurement button for 10 seconds to enter unit switching mode. Release the button when both °C and °F are flashing at the same time.
- Press the measurement button to switch between Fahrenheit and Celsius. The corresponding symbol of the selected unit will flash.
- When the desired unit is flashing, press and hold the measurement button for 8 seconds to exit unit switching mode.
If you do not press and hold the measurement button for 8 seconds to confirm the unit change before the screen switches off, the change will not take effect.