2-way push button plus with room temperature controller. For System M. Comfortable control unit with 4 control buttons, operation and status display, and labeling field. The operation display can also be used as orientation light. With room temperature controller and display. With 5 red LEDs. The room temperature controller can be used for heating and cooling with continuously adjustable KNX valve drives or for controlling switching and heating actuators. With the white backlit display for displaying time, date, temperature, and operating mode. Menu for setting standard operating modes, setpoint, work/non-work day (external trigger), display mode, time, switching times, and display brightness. The buttons can be freely parameterized as button pairs (two surfaces) or single buttons. With integrated bus coupler. The bus connection is made via a bus connection terminal. Functions of the push buttons: switching, toggling, dimming, blind control (relative or absolute), impulse edges trigger 1-, 2-, 4-, or 8-bit telegrams (distinguishing between short and long activation). Impulse edges with 2-byte telegrams (distinguishing between short and long operation), 8-bit linear controller, scene recall, scene storage, lock functions. Time control with synchronization, notification functions, cyclic reading of external temperature values, fan control, operating modes, setpoint shift. Functions of the