This LED faucet light is driven by water pressure and no battery is needed. Once you turn on the tap, water flows down, it will flash in 7 colors automatically.7 color are mixed displayed automatically when water flows. It transforms the stream of water into a beautiful waterfall of light, and offers you a delight & wonderful experience. Imagine a fantastic light "waterfall" in your bathroom or kitchen! It"s perfect for families with kids. Your kids will like this fantastic faucet light too. Ideal for bathroom or kitchen to make it fantastic. How to install? First, take off net from tap screw thread. Second, install LED faucet light screw thread. Third, usage of adapter screw thread inside universal adapter. Specifications: Case material: ABS LED emitting color: Green, Red & Blue etc. 7colors External thread diameter:M24*1mm(2.4) Your faucet should be with 24mm internal diameter. Item size: 3.5 * 2.4 * 2.4cm Package including: 1 * LED light faucet 1 * Internal thread adapter Warranty Factory direct sell, 1 year warranty, free replacement within warranty, 60 days money back, 60 days return. **Warm Tips**: Buy In Confidence and satisfaction. Visit our store for more amazing LED products: http://www.amazon.com/shops/lemonbest