These are not sweatproof, as claimed. I have had two of these units fail at the one year mark, following moderate 2-3 day per week use, for running, cycling, rowing. Never submerged, never used in vicinity of saltwater. Both units have failed by failure of the on/off/+vol button. I both instances, on opening the device, there is severe internal corrosion of that button. The adjacent -vol button is not visibly affected. I've concluded that there must be a weak spot in the case that allows sweat to invade around that button. I am a relatively "heavy sweater", so my experience may be at one end of the range. Nonetheless, two units failed each at about the same time (1yr), and each by the same mechanism. These are not sweatproof, as the description claims. I would post a photo of the postmortem, but can't see an option for posting images. Prior to failure, they worked as advertised.
We’ve tried other brands on/off-line and never had the satisfaction of sound quality, nor of ease of use, and/or overall quality. We started with Treks, then AfterShokz, and now Shokz, as the manufacturer updated its corporate structure and manufacturing technology.
The best we have seen and heard, and continued to use.
I had a pair of these that lasted a bout 9-12 months before they simply would not charge no matter what I tried. Decided to give them another try and have owned the pair I have now since Christmas 2022 (about 4 months). Same problem. They will not charge. I thought the pair before might have been faulty but looks like it may be an inherent problem with the device.