Master dimmers and accessory dimmers use standard 120 VAC 60Hz house wiring and fit into standard lighting wall boxes. Standard electrical knowledge is required for installation. Dimmers and switches will need to be paired to smart home control hub before can begin to control your lights from the Clare Home App. When more than one switch point controls the same light, an accessory neutral dimmer maintains synchronized control with a master neutral dimmer. Pair with one master neutral dimmer to control stairway, hallway and other lights with 3- or 4-way wiring. This ClareVue Accessory Neutral Dimmer also acts as a relay bridge, allowing you to expand your existing Z-Wave Network.