Schneider Electric Merten System M room temperature controller MTN5775-0325 in color active white is a central plate. Its mounting box can be recessed into the surface with flush type. It is 72 mm in width, 47 mm in height, and 72 mm in depth. This room temperature controller reaches IP20 against solid objects and liquids. System M range is based on 4 different surfaces and materials. With 9 different design variations and over 280 functions, the system can meet any customer demand.