One thing to keep in mind is that the Power2U requires a receptacle box that is 16 cubic inches or larger. This covers the vast majority of modern duplexes. However, in some older homes you may come across a few that are too small or a tight fit. The Newer Technology website has a non-exhaustive list of receptacle boxes that are compatible with the Power2U USB outlet. As an installation note, if you are going to install or replace outlets DIY style, then a neon tester, voltmeter, or a tick-tracer are a good investment. While installing the Power2U I found out that I had a circuit that was not shut off by the main breaker for some reason. Needless to say, thinking a circuit is not live can lead to a dangerous and unpleasant experience.



Link: OCC