Your customers love the Merten classic M1 and? Then we have good news for you. Merten has only slightly modified the frame design, but multiplied the range of applications at the same time. That means that now, with the new switch serie 1-M, you can offer your customers the entire breadth of the System M range. What this means: more than 280 functions and the option of offering your customers even more intelligent Merten solutions. From LED light signals and high-quality KNX keys, right through to Merten’s new CONNECT radio system.