It is simplicity itself to fit. The water flow powers a mini turbine generator inside the radio which creates the right amount of energy for a clear sound and excellent reception.
And on turning off the water the last station and volume level are automatically stored in the unit’s electronic brain ready for the next shower.
Simple to fit - no tools required - can be installed by anyone in a matter of minutes. Full instructions included. There is a video demonstration on youtube, but I cannot list it, so just search shower radio.
Never used, still in box as we bought another one for a friend - who is no longer a friend.