BG DMHCM Smart Dimmer Mod Master - BG Electrical DMHCS, This BG Smart secondary dimmer module allows you to make your existing dimmer smart, with remote operation in the BG Smart App. 2-way switch designed to be used as the second switch in conjunction with a BG Smart master dimmer switch. Set timers, scenes, random operation and adjust the lighting level to set the mood. Works with Alexa, Siri and Google for hands free control. Simple to install, with captive screws and no neutral required, fits a 25mm back box. Overload protection protects lamps, with soft start and the ability to switch between trailing and leading edge in the App. Compatible with all BG ranges including 800 series, 900 series, Nexus Metal, Evolve, and Screwless Flatplate. The dimmer can still be operated via the App even if the switch is turned off at the wall, providing an advantage over smart lamps. Compatible with incandescent, halogen and dimmable LED's (minimum 10W). BG DMHCS Smart Dimmer Mod Secondary