Can I use the Wiser plug outdoors? Follow No. The smart plug is for indoor use only. Related articles Can I take the Wiser Plug on holiday or use it outside of the UK? Can the Wiser Plug be used on an extension lead? How many devices can one Wiser Plug support as an RF signal range extender? Can I plug any electrical device to the Wiser Plug? Wiser Smart Plug LED behaviour guide Comments 0 comments Please sign in to leave a comment.