MK K4871WHI 1 Gang 2 Way 10 Amp Single Pole White Flush Plate Switch

MK K4871WHI 1 Gang 2 Way 10 Amp Single Pole White Flush Plate Switch Logic Plus

Can be used as a 1 way switch or 2 way (2 way used for switching on in one place and off in another such as hallways, stairs (switch on down stairs and switching off upstairs and of course the reverse)) , large rooms, etc.

If there is 3 floors with a middle landing an Intermeadiate switch (K4875WHI) is used