If you have an existing outdoor plug, you can buy an extension cord and cut the female end of it off and wire it to a GFI unit inside a weatherproof box with a weatherproof cover. Wire up the cut extension cord as your line input to the GFI. Plug in the extension cord to your existing outside plug. Plug the AirLink into the GFI outlet. Alternatively, if you didn't want to use a GFI, you could put in one of the USB outlets and skip using the AC adapter since the USB end would plug into the duplex. I am opting for the GFI and if there are issues with the adapter, which I don't think there will be, I will resort to option 2.