This is will save power used in your home. It’s show you how many watt’s pulled from the grid. Here is what they said on the page:
Designer Muhyeon Kim has created the “Insic Wall Socket” — an outlet that lights up to tell you just how many watts you’re pulling from the grid with whatever it is you just plugged in. The idea is that by instantly seeing how much power we’re using, we’re encouraged to unplug energy hungry devices as quickly as possible. We’d also become more savvy about how much energy we really use during the day, as well as what devices are surprisingly big energy hogs. But while it has its obvious benefits, does an outlet like this make practical sense?