Add On Switch for 3 and 4 Way Use 120VAC, White. Allows for single pole setup, or multi-way functionality (up to 6-way with the IDEVZ03DW addon switch). Excellent for use with Z-Wave supported security systems to control lights in tandem with extenal triggers. Smart Home interface using RF technology, providing unparalleled flexibility anywhere in your home. Control and monitor your home's switch-operated interior and exterior lighting, switch-controlled fireplaces, receptacles and more to turn on and off from anywhere. Conveniently operated through other smart home integrations with Alexa, Alarm.com, and the Google Assistant.