to get started with single-room control, ambiSENSE, ambiSENSE requires the multiMATIC 700 controller, sensoCOMFORT and sensoDIRECT, ambiSENSE is set up, configured and operated with the app, consists of: Internet module VR 921, 3x thermostatic valve VR 50, Note: thermostatic valve extension packages are available in the price list for system packages & sets