... flows down, the LED will light instantly an automatically;When water temperature is ≤32°C,Blue color will show automatically ; 2).When ... :only two color LED light1,The product built-in device for mini generating electricity,illuminated by water without battery,the light will not ... water was turned off. 2 ,it can only emit one color light,Green,Red,Blue,Yellow,purple for your choice. the 7 ...