See right away how warm the water is: as soon as you turn on the faucet, the stream lights up red, blue or green. So you can immediately recognize the temperature range.
No power supply necessary: The lighting is powered by the integrated dynamo - by water power alone, without batteries.
Fits practically anywhere: You simply screw the light attachment into the thread of the faucet instead of your existing jet regulator - whether in the kitchen or in the bathroom. And your guests will make eyes.
