KNX Room Temperature Extension Unit Smart 55, White glossy finish. With colour display, temperature- and humidity sensor. Suitable for 55 mm switch ranges e.g. MDT assortment 55, GIRA Standard 55, E2, E22, Event, Esprit, BERKER S1, B3, B7, JUNG A 500, A PLUS, A CREATION, AS 500, A 550, A FLOW or MERTEN 1M, M-Smart, M-Plan, M-Pure. Active colour display for function and status indication. Selectable background colour and brightness of the display (white or black). Display of set- and actual temperature. Room temperature extension unit for rooms. Measurement range -10 … +50 °C. Easy setpoint adjustment over separate +/- Push-buttons. 1 Bit +/-, 1 Byte or 2 Byte absolute object for setpoint adjustment. Temperature min/max memory and messages. Room temperature control in combination with the MDT AKH-Heating actuators. Ventilation control with manual and automatic operation. Installation in an installation box using the included installation frame. Recommended installation height: 1.60 m. Integrated Bus coupler. 3 year warranty.