brand new and high quality You may be puzzled with the water temperature unless you for touch it, now with this device this problem is solved Directly installed on the faucet, it can be used Water flow activates the light source The sensitive faucet light will change colors according to the temperature of water. The color's change remind you the water's temperature. No batteries and external power supply, it will illuminate after water flows down. Offer you a delight & wonderful experience. ABS chroming material, excellent corrosion resistance, durable. for Ideal for bathroom or kitchen to make it fantastic. Color: When water temperature is 31C, Green color will show automatically When water temperature is between 32C ~ 38C, Blue color will show automatically When water temperature is between 39C ~ 45C, Red color will show automatically When water temperature is above 45C, It will be red and blue flickering together Specifications: for Case material: ABS LED emitting color: Green, Blue & Red External thread diameter: 23.5mm Item size: 35 x 37mm (H x Dia) Color: Silver