The product built-in device for mini generating electricity， illuminated by water without battery， the light will go out when the water was turned off.The illuminated color will change according to the water temperature.When water flows down， the LED will light automatically.When water temperature is 32， green color will show automatically.When water temperature is between 33-41， blue color will show automatically.When water temperature is between 42-45， red color will show automatically.When water temperature is above 46， red color will flash immediately.Two universal adaptors (included) fits most water faucets.Type: RGB LED Water FaucetMaterial: ABSLED Qty: 1 PcLED Color: Red， Green， BlueFaucet Length: 55mm/2.17" (Approx.)External Diameter: 28mm/1.10" (Approx.)Screw Thread Diameter: 22mm/0.87" (Approx.)Adapters Size: 20mm/0.79"(Approx.)， 24mm/0.94"(Approx.)Features: Temperature Sensor， Automatically Change， RGBNotes:1. Due to the difference between different monitors， the pictures may not reflect the actual color of the item.2. Compare the detail sizes with yours， please allow slight difference due to manual measurement.Package Includes:1 x LED Light Water Faucet2 x White AdaptersWe will provide you high quality， competitive price， timely delivery products and good service.