1. No battery needed---water power
2. With valve, it can adjust the flow of water
3. With water saving and filter systems
4. When water flows down, the LED will light instantly and automatically.
A. When the water temperature is below 28 degree, blue color will show automatically;
B. When the water temperature is between 29~36 degree, Green color will show automatically;
C. When the water temperature is between 37~43 degree, Red color will show automatically;
D. When the water temperature is above 44 degree, RED color will flash automatically.