This single hole bathroom sink faucet adopts hydropower LED technology that requires no batteries or external power plugs, as water pressure creates electricity to light up the LEDs automatically once you turn on the water. The integrated waterfall spout delivers a smooth cascading stream while the LED light shifts color according to the detected water temperature, shining blue for cold water from 0 to 30 degrees Celsius, green for warm water from 31 to 42 degrees Celsius, steady red for hot water from 43 to 52 degrees Celsius, and flashing red to alert you of dangerously hot water and prevent accidental scalds. It comes with two standard supply lines for simple installation, and its single lever handle allows you to conveniently adjust both water flow and temperature with easy smooth movements. This functional decorative faucet brings a refreshing visual effect to your vanity sink and serves as a practical safety upgrade for your bathroom.