Check the listing for details. ZLink In-Wall 3-Way Auxiliary Switch - ZL-WA-100. Color: White, Condition: New. Listed at 15.00 USD. These are NOS "New Old Stock", that have never been opened and are brand new. MANUFACTURORS INFO--This switch is intended to be used only with Z-Wave certified In-Wall units such as WS-100 and WD-100 modules and any 3 way switches in a home. Basic connection is made by a hard wire between the 2 Traveler terminals. Up to 3 units of WA-100 can be added to a particular light switch to form up to a 5-way association. The WA-100 carries no live (Line) power and it’s not transmitting or receiving any RF signal.Features:Mounting: Standard J box / Single gang3-Way Auxiliary switch that works with ZWaveProducts WS100 wall switch or WD100 wall dimmerFits standard wall plateUp to Three WA100 Auxillary switches (5 way) can be used with one ZWaveProducts in wall switch or dimmerWhen used with WD100 dimmer, WA100 can also be used to control dimmingThe ZLink Auxiliary Switch works with nearly all Z-Wave hubs. The latest ZLink In-Wall Switch comes equipped with the latest features as well. These features include Z-Wave Plus and multi tap scene control. It requires a retrofit install that can take your home lighting system to the next level.