WIDE APPLICATIONS: this small device is suitable for most faucets that have internal or external threads. 3 COLOR CHANGE ACCORDING TO TEMPERATURE: Blue color appears when the temperature of the faucet water 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 WATER SAVING: The led faucet faucet has water conservation function and connected at the top with the filter water-saving, Convenient to use. Helps children avoid scalding water. A must have device for every home. HOT 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 LED emitting color: 3 colors< /p> Internal diameter: 1.5cm Outer wire diameter: 2.2cm Item size: 3.5*2.4*2.4cm p> Item weight: 22g 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.