4leds
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