MS ceramic cartridge(600,000 times for both open and close).
Built - in LED light
LED color changes with water temperature
No battery, power from water pressure
Function: the led color can be changed by water temperature:
A. When water temperature is<30 degree,Blue color will show automatically; B. When water temperature is between 30~40 degree,Green color will show automatically; C. When water temperature is between 41-50 degree,Red color will show automatically; D. When water temperature is above 51-100 degree,Red color will flash frequently.