Esumsky&reg; Temperature Controlled Multi Color Changing LED Light Faucet For Bathroom/Kitchen 8001-A6 Very environmental,no batteries needed,Built-in mini generator powered by water. Wires are completely isolated from the water so is totally safe Lights turns on/off automatically with water flow Temperature sensor controls the LED lights, LED Color: Sensor RGB color changing(blue,green,red) Easy to install and uninstall, great accent for your sink