It does not use electricity or batteries to read the temperature. It reads the temperature due to the pressure of the water force
° Digital LED screen to show realtime water temperature
° Temperature range kawaida
° Accuracy to read temperature
° Water-flow powered (they don't use battery)
°360° rotating display for easy viewing
° Auto ON/OFF starting or off water
° Celsius/Fahrenheit switching
° Color indicators:
> Blue → cold water
> Green → normal
> Red → very hot water
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