The XPSS Slave Switch works with the XPS3, XPD3 and XPDI3 Master Wall Switches to complete a 3 or 4-Way installation.

The XPSS sends a 120Volt pulse from its Switch Terminal to the Master Switch's Control Terminal via one traveler wire.

Dimming can be performed from either the XPSS or the Master Switch location as long as the load attached to the Master is dimmable, and you must use either of the XPDI3 or XPD3 Master Dimmer Switches.

The Master Switches perform all the load control, the Slave simply tells the Master to turn ON/OFF or Brighten/Dim as applicable the the installation.