I first bought them in 2014. One of them lost USB functionality about a year ago, but still works for over 7 years (sockets still work). I just bought another round of these and am just as happy as the first time. I live in a very old building in NYC and the outlets are limited and a little awkward. I used this to safely increase the number of 3 pin sockets available. I use one under a stereo as I wanted to avoid the typical surge protector due to its visibility. Very satisfied, highly recommended.
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