Definitely in place. That was my initial thought as well when we first had issues with the SMH-10 units. The rubber covers on the SMH-10 is a little flimsy and could work its way loose if not really careful. We had hoped the upgrade to the 20S and 20S Evo would address issues since the cover is a bit more ridged and easier to secure.
They don't close much more secure than this, but we continued to have issues with them. So we changed over to the Cardo, as have several others in our club.
Here is a link from Sena's site to a post about the issue.
i bought a set of Sena 20s comunicators for my wife and i to talk bike-to-bike. Today we rode in the rain for about half an hour, not a toad...
That USB Port is in the rear of the unit as well, so it isn't as though rain is being driven into it. I suspect the water gets in around the rotary dial. A fair amount of water has gotten into them at times as well.
But I do get annoyed with the cut-out issues we seem to have with my wife's helmet with the Cardo. We have tried swapping mics, swapping units, etc. Whatever the issue with that seems specific to her helmet, bike or something. Can't seem to solve it.
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