What voltage does the Wiser Plug support? Follow Works with standard UK mains wall socket (230V a.c.) Related articles What happens with my Wiser Plugs when I activate Wiser’s Away Mode? Can I plug any electrical device to the Wiser Plug? Getting to know your Wiser Plug Do the Wiser Radiator Thermostats call for heat? Can I take the Wiser Plug on holiday or use it outside of the UK? Comments 0 comments Please sign in to leave a comment.