Specification :

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 d32 , 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.