The first thing you notice about the 680i’s are the shark-like fins that protrude from each earbud. These fins look as if they would feel uncomfortable, but they do a great job of holding the earbuds in place, even while working out. You can wear them for several hours, and while you know you’re wearing headphones, you don’t feel any real discomfort. There’s not much that’s more annoying and potentially dangerous than an earbud falling out while running on a treadmill or an elliptical machine. You can feel secure that this won’t ever happen while wearing the 680i’s.
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