The product built-in device for mini generating electricity,illuminated by water without battery,the light will go out when the water was turned off.The illuminated colour will change according to the water temperature

A.Between 0~29°C , the LED faucet light will emit Green colour(or Blue colour)

B.Between 30~39°C, the LED faucet light is Blue colour(or Green colour)

C.Above 40°C, the LED faucet light will emit Red colour