You may be surprised by the temperature of the water unless you touch it, now with this device this problem has been solvedDirectly installed on the faucet, can be usedWater flow activates the light sourceThe sensitive lighting of the faucet will change colors according to the temperature of the water. The color change resembles the temperature of water. No battery and external power supply, it will light up when the water drains. Offer pleasure and a great experience. ABS chrome plating material, excellent corrosion resistance, . Perfect for the bathroom or kitchen to make it fantastic. Color:When the water temperature is le; 31°c, the green color will display automaticallyWhen the water temperature is between 32°c and 38°c, the blue color will appear automaticallyWhen the water temperature is between 39°c and 45°c, the red color will appear automaticallyWhen the water temperature is above 45°c, it will be red and blue flickering together specifications:Housing Material: ABS LED Color: Green, blue and redExternal thread diameter: 23.5mmProduct size: 35x37mm (H x D)Color: silver