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The X10 Decorator Style Companion Switch converts RWS17 wall switch into a 3- or 4-way wall switch. Simple to install, decorative styling.
The RWS19 Decorator Companion Switch MUST be used with either the RWS17 Decorator Dimmer, or RWS18 Decorator Switch. The RWS19 is normally used for what is referred to as "3-way" applications (where you have two switches controlling the same light, at the top and bottom of a staircase, for example). Refer to the instructions supplied with the RWS17 and RWS18 for more details.
The RWS19 can also be used for 4-way applications (where 3 switches control the same
light). For 4-way applications, connect the RWS17 or RWS18 and one RWS19 as per the instructions supplied with the RWS17 or RWS18. Then connect an additional RWS19 as shown in the diagrams