The Grohtherm SmartControl Single Function Thermostatic Trim from GROHE is a slim, contemporary design that will enhance any bathroom. This innovative, single-function SmartControl allows you to adjust water volume from one spray source with the simple push-turn of a button. It features integrated GROHE Turbostat technology to keep water temperature consistent for the duration of your shower, preventing any unpleasant hot/cold fluctuations. Please note that this product must be installed in combination with the GROHE Rapido SmartBox (35601000).