What voltage does the Wiser Plug support? Follow Works with standard UK mains wall socket (230V a.c.) Related articles Can I plug any electrical device to the Wiser Plug? How many devices can one Wiser Plug support as an RF signal range extender? Can I take the Wiser Plug on holiday or use it outside of the UK? Can I use the Wiser Heat app on a tablet? I bought a smart plug to use as an RF range extender for one of my radiator thermostats. Can I move this plug to another wall socket? (WH) Comments 0 comments Please sign in to leave a comment.