Outdoor double socket, with WiFi booster.
I replaced this old outdoor socket with a much newer design, not only will it keep the water out even when something is plugged in but it also has a built-in WiFi extender. After a quick, one-button set-up there is now a WiFi signal all the way down the garden. Great for keeping the music flowing now we'll hopefully be getting more BBQ weather.
I was very impressed with how easy to set up the WiFi booster was. One press of a button on the router inside the house, and one press on button at the socket and it was ready to go. You can get these for indoors too, and are great for extending your WiFi reception to parts of the house where signal is weak.