This Screwless Flat plate black nickel finish 20A 16AX single light switch from British General will operate one light in a room. The 2 way switching allows a second switch to be added to the circuit to operate the same light from another location (e.g. at the top and bottom of the stairs). This switch has a screwless flat plate that clips on and off and sits flush against the wall making it ideal for modern interiors.