Negative Positive
Title: ONLY for two-prong ungrounded use, incompatible in some European countries
Review: This is an old design that has two significant flaws.On the input, as others have noted, it only accepts unpolarized two-prong plugs. No polarized plugs, no three-prong grounded plugs.The European adapter is an odd shape although perhaps it would fit. BUT it is the older ungrounded European plug. This will not work in grounded European sockets.This should be made clear in the product description.I'm returning it.
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