X10 PRO Companion (Slave) Switch for 3 Way Applications

The XPXPSSIW Slave Switch works with the XPXPS3, XPXPD3 and XPXPDI3 Master Wall Switches to complete a 3 or 4-Way installation. The XPXPSSIW sends a 120 Volt pulse from its Switch Terminal to the Master Switch's Control Terminal via one traveler wire. Dimming can be performed from either the XPXPSSIW or the Master Switch location as long as the load attached to the Master is dimmable, and you must use either of the XPXPDI3 or XPXPD3 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.