La description

Features:

●Special design high quality LED shower head with three beautiful colors,It’s extremely convenient practical, good-looking and fun.
●Lights are powered by the water pressure - no electrical wiring needed .Water flow automatically changes the color with the temperature changed:
●- 0℃**2℃ Green.
●- *3℃**1℃ Blue.
●- Higher than *2℃ Red , reminding you that the temperature is  exorbitant, careful scald.
●Witha swivel ball joint , can adjustable it to fit for your need 
●No Battery and electronic connection needed to supply power, the water flow supply power to itself,it is very environmentally friendly.
●You don't have to worry about whether can economize electricity generated communication, voltage only about 3.5 V, equivalent to two dry batteries, water flow and lines are separated, so please rest assured use .