1¡éas the built-in device generating electricity without the battery and any other power connets to water, led will emit the light.
When water flows down, the led will light instantly an automatically;
When water temperature is, green color will show automatically ;
;¡éwhen water temperature is between 3 blue color will show automatically;
C¡éwhen water temperature is between red color will show automatically;
D¡éwhen water temperature is above red color will flash immediately.
3. This item will change its color by detecting water temperature.

Color box packing:1 piece inner each color box
36 piece outer each carton