LED Water Faucet Light-up with adaptersize:35mm*24mmABS chroming material, excellent corrosion resistance, durable. The light is activated by water pressure and turns off automatically with the water. Ideal for bathroom or kitchen. Some colors not affected by water temperature. Water glows blue when water is cold (temperature below 31°C )Water glows green when water is warm (temperature is 32°C 43°C)Water glows red when water is hot (temperature above 44-50°C)Water flash red when temperature above 50°C.When the water temperature is over 51°C, flashes red to warn you and avoid being scalded. Colors will light at random at the same time once there is water flowing through.