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1?As the built-in device generating electricity without the battery and any other power connets to water, LED will emit the light.2? When water flows down, the LED will light instantly an automatically;
A?When water temperature is =32?,Green color will show automatically ;
B?When water temperature is between 33?-41?,Blue color will show automatically;
C?When water temperature is between 42?-45?,Red color will show automatically;
D?When water temperature is above 46?,Red color will flash immediately.
3. This item will change its color by detecting water temperature.
