Room Temperature Extension Unit Smart 55, White glossy finish. With colour display and temperature sensor. Flush mounted. Integrated BCU. Fits 55mm systems/ranges: – GIRA Standard 55, E2,E22, Event, Esprit. – BERKER S1, B3, B7. – JUNG A500, Aplus, Acreation, AS500. – MERTEN 1M, M-Smart, M-Plan, M-Pure. Active colour display to indicate function and status. Background colour w/b and display brightness adjustable. Display of set and actual temperature. Room Temperature Extension Unit for indoor rooms, Range -10 to +50°C. Simple setpoint adjustment via separate +/- buttons. 1Bit +/-, 1Byte oder 2Byte absolute object for setpoint adjustment. Limit values min/max, min/max memory. Controlling of the room temperatur in interaction with MDT AKH- Heating Actuators. Ventilation control by hand or automatic operation. Installation in a installation box with included support ring. Recommended installation height: 1,6m. Integrated bus coupling unit. 3 years warranty.