The most recent iteration installed does in fact have a wall mounted removable remote control. About 5cm by 30 cm. I can only imagine how much fun it would be to stand outside the door with one of those causing shrieks of terror as I alternately dial up jets of ice and warm water on the posterior of my unsuspecting victim.
What? A remote control 5cm by 30cm? Is that a rod for pressing the buttons remotely on an arms length?
Anyhow, more fun would of course be to have a multi-remote control with all toilets in the house/apartment hooked up on one remote control, causing multiple shrieks of terror after that delicious backed bean dinner.