Enerwave ZW3K-W 3 Way Z Wave Auxillary Switch Addon to Enerwave Z-Wave Switches and Z-Wave Dimmers Wireless Home Automation, 120VAC 60Hz, NEUTRAL WIRING REQUIRED, White Ideal Z-wave device to work with on/off switch (ZW15S) and dimmer switch (ZW500D) controlling one lo Manual On/Off & Dim control of any connected load through traveler wire. Air-gap Switch feature meet UL requirement and disconnect power from load locally *NOTE* You must use ZW3K with ZW15S or ZW500D together which means you CANNOT use it alone as a **NEUTRAL WIRING REQUIRED** Specifications: 120VAC, 60Hz. Wiring Required: Neutral, Traveler