The UniFi Dimmer Switch is a smart in-wall dimmer switch for use with the UniFi LED Lighting System. Powered by 802.3af PoE, the UDIM-AT is designed to fit in an electrical gang box and networked by ethernet. Use the intuitive UniFi LED App and LED Controller to configure the UDIM-AT to control a defined group of UniFi LED. For use with the UniFi LED Lighting System Configure and Control Multiple UniFi LED Lights Physical On/Off and Dimming Functions Powered by 802.3af PoE Fits 1-Gang in-wall electrical Box Configured and Managed by UniFi LED App and UniFi LED Controller