Case Material: ABSLED Emitting Color: Green/Red/BlueInternal Diameter:1.5CM， External Thread Diameter:2.2CMItem Size:3.5x2.4x2.4CMColor: Silver Features: 1.This little device fits on most taps and lights up a set of LEDs when you turn on the tap. Transforming the stream of water into a beautiful waterfall of light. 2.The sensitive faucet light will change colors according to the temperature of water. 3.The color's change remind you the water's temperature. Water flash red when temperature above 50°C Water 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). 4. No batteries and external power supply， it will illuminate after water flows down. Package Information:1x LED Light Faucet Tap