It can be used to any size of international faucet with different screw Connection.
Blue/Red LED - Normally streams BLUE LED's until the water temperature reaches 50 degrees after which the LEDs turn RED!
It can be changed battery freely.

4 Super normal RB LEDS
Main body: PMMA with zinc alloy
size: Dia 40MM*55MM
Battery: 3*AG1625
LED colour: blue and red color