I agree with the rest of the 5-star ratings and will not repeat the praise. I bought two pairs of these headphones because they sound better than my $125 Bluetooth headset. Two comments that might be helpful to buyers that I didn't mention: The silicone earbud is split so the eartip can be properly adjusted to fit both the ear canal and the ear properly. Once properly adjusted, the security and seal in the ear canal is EXCELLENT and stays in place. The earbuds are angled. So if you feel the eartips don't fit, you may have put them in the wrong ear (assuming you don't have a defective product). I've noticed that most headphones should have the side with the controls and microphone on the right. It's the other way around. The microphone must be on the left side for the eartips to fit properly in the ear canal. It's a bit strange to note that in this position the "SONX" lettering on the bud is upside down.
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