Homematic IP Wall switch - 2-gang, anthracite #161869A0 The Homematic IP Wall Switch - 2-gang in anthracite is part of the Homematic IP smart home system and is a practical wireless push-button solution in a classic form factor that can perform several tasks at once. After a one-time assignment within the free app, the wall switch can be used to control either the light or the heating. For example, one press of a button can set the heating to setback mode (eco mode) or switch the light on/off. Up to two functions can be conveniently assigned per wall switch via the app and then used independently of the app.