WIDE APPLICATIONS: this small device fits most faucets that have internal or external threads. 3 COLOR CHANGE ACCORDING TO TEMPERATURE: Blue color is displayed when the water temperature is ?32 degrees. Green color displays when the water temperature is between 33-41 degrees. The red color appears when the water temperature is between 42 and 45 degrees. Red color flashes when temperature exceeds 46 degrees. PREMIUM MATERIAL: Made of ABS with excellent corrosion resistance. Ideal for bathroom or kitchen, very fantastic and durable. EASY TO INSTALL AND SAVE WATER: The led faucet faucet has water conservation function and connected at the top with the water saving filter, convenient to use. Helps children avoid scalding water. A must have device for every home. WARM WARNING: If the water faucet LED lights up, it requires a certain water pressure. And it won't turn on if the water pressure is too low. The faucet is made of ABS, so recommend wrapping PTFE tape on the thread when installing the faucet. Be careful not to use too much force during installation. (ABS material is easily broken if you force too much.) Specifications: Case material: ABS Color emitting LED: 3 colors Internal diameter: 1cm Item Size:35*24mm Item Weight: 23g Functional descriptions: LED light color: Blue/Green/Red (Temperature detectable) 1. When the water flows down, the LED lights up instantly and automatically: A. When the water temperature is lower than 32 degrees, blue color will be displayed automatically; B. When the water temperature is between 33 and 41 degrees, GREEN color will automatically display. C. When the water temperature is between 42 and 45 degrees, ROLLER color will be displayed automatically. D. When the water temperature is above 46 degrees, the RED color will FLASH immediately. 2. This item will change its color by detecting the water temperature.