Smart Home button X-IC-18-4001 with fully integrated digitalSTROM technology on board. Compared to a standard button, the 'dS IC button T18' is only 5 mm deeper in its internal structure. Only L and N are connected to the T18 via integrated spring terminals. The button acts directly on the integrated dS electronics. The registration mode in the digitalSTROM network can be read from the LED on the back. The buttons match the rockers and frames of the GIRA switch series E2, E3, Event, Esprit and Classix. The 55x55mm rocker switches are not included in the scope of delivery.