Clever snap-on USB charger faceplate for normal US/Canadian power receptacles

I'm intrigued by this cleverly designed USB charger faceplate for US/Canadian power receptacles: you unscrew your existing faceplate, insert this one into the receptable so that its USB charger leads make contact with the screws on the sides of the receptacle, and screw it back in, and in theory, you now have two power outlets and two USB charger outlets. (more…)