Built-in 12 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'C~43'C; Red: 44'C~50'C. - When the water>50'C be careful to avoid being burned red flashing prompt. - Service lifetime: > 6000 hours. - Environmental 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 to give your bathroom decor a modern update.