With label field. For Busch-Installationsbus® KNX bus coupler 6120/12-101, 6120/13 and Busch-Powernet® KNX network coupling 6920/12, 6920/13. Support of KNX functions through innovative color concept (yellow = lighting, blue = blinds, orange = RTR, magenta = scene and white = neutral / no function assignment) or standard lighting red / green. Button function (switching / dimming / blinds / sending value / light scenes / ventilation function) Master / slave operation. With base load operation. The controller is a constant room temperature controller for fan convectors (fan coil) in 2- and 4-pipe systems and conventional heating or cooling systems. The fan level can be switched manually or to automatic mode. Transparent label sheet with standard symbols included in delivery. Class of the temperature controller: 1 Contribution to space heating energy efficiency: 1.0%. ETS programming only from ETS 3.0f