Sorry should have worded my response better, with zwave or fibaro a module goes behind existing switch that can then be operated by either a handheld remote or an RF switch that looks sort of like a coaster and can be screwed to wall or left on a coffee table.
lightwave RF you replace the existing switch with a lightwave one and then either control that via another wireless switch plate, handheld remote or even your mobile phone via an app.
The Fibaro relay switch is exactly what I'm looking for, can't seem to find remote fobs for it though?