Track all of your home's energy hogs with this $249 box

You might have an idea of what appliances cost to run, including things like heat and air conditioning, which can make your bill go sky high if you leave them on all the time. It's designed a $249 device that clamps into your fuse box and will attempt to itemize each and every appliance, set of lights, and even things like a vacuum cleaner, giving you an idea of what's using energy in real time.

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