I've been using the Camco shower head with an on/off switch in my RV.
I picked this
shower head extension from the multitudes for the on/off switch option on the head. I wanted this not only to use in the RV shower but also for washing my dogs.
It's quite hard to switch the water off, with a regular shower head, when you're shampooing the dog without losing them. Then when you turn a normal shower head off you have to readjust to get the temperature right again.
But with this, all you do is flip the switch on the handle. It is awesome.