The Switch 55 Anthracite 2Way Rocker 4 Channel EnOcean Casambi by Casambi is a wireless and battery-free wall switch using EnOcean energy harvesting technology, where each press converts mechanical energy into a signal for the Casambi Bluetooth mesh network, enabling up to four configurable channels for controlling lighting, scenes, groups and dimming functions via the Casambi app without wiring or maintenance, and its compact 55×55 mm form factor allows flexible installation using screw or adhesive mounting for seamless integration into modern lighting systems.