The sensitive faucet light will change colors according to the temperature of water.The color's change remind you the water's temperature.Water flash red when temperature above 50°CWater glows Red when water is Hot (temperature above 42°C).Water glows Green when water is Warm (temperature is 33°C - 41°C).Water glows Blue when water is Cold (temperature below 32°C).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.Ideal for bathroom or kitchen to make it fantastic.Get the CE & RoHS certificates.Direction for use:Firstly， take off net from tap screw thread.Secondly， install LED faucet light screw thread.Thirdly， usage of adapter screw thread inside universal adapter.(adapter screw thread not included)Note:Automatic generation without batteriesSpecifications:Case material: ABSLED emitting color: Green， Red & BlueInternal diameter: 15mmExternal thread diameter: 22mmItem size: 35 * 24 * 24mmItem weight: 20gColor: Silver