When water flows down the LED will light instantly and automatically. The led shower head is powered by running water, no batteries or distasteful wires ever eeded. Rely on hydraulic drive generating their own power, No need for the power supply, safe and environmental.The sensitive faucet light will change colors according to the temperature of water. Excellent Corrosion Resistance - Made of ABS material with excellent corrosion resistance. With surface precision polishingand have the nickel and chromium plating layers. Ideal for bathroom or kitchen, very fantastic. A Perfect Gift - As a toy, it entertains the kids. Kids will wash there hands more. Great value as a bit of fun for children and they love them. Gasps of wonderment and giggles of delight every time they turn on the tap. Adds a bit of fun and interest on a boring facility. 7 Colors- The color will change automatically and create special atmosphere in your bathroom. You can enjoy the pleasing bath after a long day. Besides, the colorful light may make your kids fall in love with bathing.(The color will not be affected by water temperature.) Great for life. Right size of the nozzle can help you save water. Brightness is such enough so that there is no need other lighting fixtures to help you save energy.