This little device controls the bath. At the press of the red button, it will run my bath, to my desired temperature (43c) and will stop running when it reaches the programmed level, at which point a female voice projects throughout the flat to advise me I need a scrub. But the service doesn't stop there, the bath maintains the same temperature for aslong as I wish. Of course, such luxury does come at a price, everything is in Japanese, and it took me several scolding baths to fathom what buttons I needed to press.