Bracelet Shower / Bracelet Shower

This is a public bathroom shower.I designed it in order to prevent the waste of water resources in public places.I set the amount of water restriction which is enough for most people's requirement,but if you run out of it,you should pay for the excess part.

It is controlled by the bracelet.
Let the bracelet touch the Sensor to turn on/off the shower.
Spinning the bracelet to adjust the water yield.
Let the bracelet up/down to adjust the temperature