This is a combination of two devices. First part is a switch sensor (4-Fold) with 8 buttons. It controls the underlaying dimmer and contains the zigbee Light Link Radio. Because of the zigbee Light Link Radio, it is the zigbee Light Link interface that allows to control the dimmer from remote. Second part is a phase cut dimmer for dimmable LED Lights that additionally acts as a power supply for the sensor. The sensor (first part) will be plugged onto the dimmer (second part).