Built-in 15 RGB LED emitters; No battery needed; Visually displays current water temperature; LED color changes according to water temperature; LED light is activated when the faucet senses water flow; Mode: Green: </= 31'C; Blue: 32~43'C; Red: 44~50'C; When the water >50'C be careful to avoid being burned red flashing prompt; Service lifetime: >6000 hours; Environmentally-friendly and energy-saving; Stylish and durable Easy installation; Clean the surface regularly with water and wipe with a soft cloth; For difficult stains or spots use a mild detergent or colorless glass cleaner; Give yourself a gift with this stylish shower head and give your bathroom decor a modern update