I bought my first house last year (2017) and some outlets are grounded and some are not. This adapter provides access to multiple plugs for NON-grounded outlets as well as an instant warning that you are not plugged into a grounded outlet. The display is easy to read when the sockets are not grounded. The USB slots provide easy access for charging your electronic devices, and you still have 6 other standard outlets to use as long as all your plugs fit. I have several of these surge protectors at home and highly recommend them!
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