Product Description Function: Shower faucets Feature:Wall Mount Style: Contemporary Type of valve: Ceramic valve Faucet body material: stainless steel Spray Material: ABS Plastic (Chrome Finish) Shower hose: Stainless steel material Chrome finish 150cm the shower head only has blue light, the color can’t change by water temperature as soon as you turn on the water, the blue light will work, only when you turn off the water, then the blue light will turn off. LED light powered by water flow, no battery or plug needed 3 handles/knobs for different functions, this is not a thermostatic mixer. Operating principle -This product does not need a battery or other power input,The LED and digital display are powered by water flow,There is a hydroelectric generator at the inside the product.,When there is enough water flow, it will generate a safe power supply for LED and digital display.