The Red Dot is actually just the GFCI (Ground Fault Circuit Interupter) weather proof cover. They sell them at any Lowes or Home Depot. You will need an old work "cut in" electrical box, a GFI 110v 15a or 20a recepticle and a white GFI recepticle cover.
It is essentially the same equipment you would use to add an outdoor outlet in your house.
Hope this helps