This little device fits on teeth Provides you with gorgeous bathroom and wonderful experience requires no batteries or external supply Temperature-sensitive and automatic controlled LED Faucet If the water flows, LED lights will light up immediately This LED Faucet Water Tap requires no battery or external supply and is controlled temperature sensitive and automatically. It is a very practical and stylish LED faucet apparatus for your kitchen. LED color changes automatically when the water temperature changes The colors of the LED lights prompted the temperature of water LED Emitting Color: Green, Blue and Red Water temperature at below 31deg C: Green LED light Water temperature at between 32 to 43 C: Blue LED light Water temperature at between 44 to 50 C: Red LED light Water temperature at about 51 C: LED lights flash red to prevent scalding Shower head Diameter: Approx 1.1 inches / 2.8 cm Inner Diameter: Approx 0.59 inches / 1.5 cm External thread diameter: Approx 0.87 inches / 2.2 cm length: Approx 1.97 inches / 5cm LED : 1 LED Material: ABS Color: silver Package Included1 x LED Faucet Note:Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3 cm.