In fact, the shower spray is no different from that set in your bathtub, for the only exception that it is integrated LED backlight that changes color depending on the temperature of water flowing through it.

At a temperature not exceeding 32 degrees Celsius turn green light when the water temperature ranges from 32 to 40 degrees, blue light is lit and if the temperature exceeds 41 degrees Celsius, the red LED lights. If the bather to pour 50-degree water bewitched, shower flashing red light, signaling that it is time to slow down the pressure of the hot pipe. "

And, more interestingly, the LEDs are powered from the internal oscillator, used to generate electricity all the same water flowing through the shower hose.

Room spray is $ 13, buy it here.