Look around you. Chances are pretty good there are at least half a dozen things within arm's reach of you that are plugged into a power outlet. Your laptop, your tablet computer, your phone... even that awesome pair of wireless headphones need to be charged. Everything gets plugged in, though some of the smaller devices have charging interfaces that double for data ports.
Your cellphone, for instance, probably recharges over USB. The manufacturer was kind enough to give you a wall-outlet dongle that converts the 110 volts coming out of your wall outlet into 5 volts of USB power. That's fine, but you'll either lose an outlet with that adapter, or you'll misplace the dongle, and you'll have to plug into your computer, and that's not always convenient.
So some enterprising engineers at Fastmac realized how easy it would be to just build the transformers right into the wall outlets! Put 2 USB ports in the wall plate next to the 110 volt sockets, and you've doubled the versatility of your power line. We just happened to get a hold of a handful of these outlets, and brought them to you because, well, we think they're pretty awesome.
Note that you need to use your considerable brains to install these outlets. Please learn everything you can about replacing wall outlets before even thinking about performing this kind of electrical work. Electricity is dangerous, and you could electrocute yourself, set the house on fire, or ruin your sensitive electronics if you do something wrong. This is srs bznz, so don't cut corners. Tell you what,