LED LIGHTSBuilt-in LED lights, no batteries and external power supply, it will light up after water flowing. Color changes with water temperature.INTELLIGENT SENSORWith a sensitive temperature sensor, the faucet lights up blue when the water is cold (below 31C). It turns green when the water is hot (32C-43C) and red when the water is hot (43C-45C).HOT WATER REMINDER FOR SAFETYWhen it exceeds 45 degrees, the red light will flash as a reminder. Be careful to avoid burnsEASY TO INSTALL EASY TO INSTALL The connector can adapt the faucet to a variety of faucet interfaces. First, remove the thread from the faucet screw thread; Second, install the LED faucet light thread; Thirdly, the use of the adapter thread inside the universal adapter.NOTE Automatic generation without batteries. When the water temperature appeared between two temperature ranges, the color will flash, for example when the water temperature is 43, the color will flash between red and green.