The Megaman Smart ZB Dimming Module 250W is an auto dimming module for seamless dimming performance the 3-wire connection Smart ZB Dimming Module is Zigbee® Home Automation Certified, and compatible with all Megaman standard dimmible products. Functions include ON/OFF, dimming, group control and scene control. It has trailing edge dimming and intelligent dimming mode that can select the best dimmng mode for attached devices and set automatically. The dimming module can connect with 500Va (total) resistive for appliances or 250Va (total) LED devices. Accessories inlcude a Magnetic holder and 2pcs of 3V CR2032 Battery.