you absolutely cannot even hear the slightest bit of wind even at 130km/h (tested), and voice comes through crystal clear and surprisingly still does with music playing in the background.
Great to know, it looks like we have a really good deal here. I forgot to mention the voice over music capability, it was quite a pleasant surprise.
The only thing that would make it better is if it was stereo and worked with a cell phone. However, that's honestly too much to expect for $9 and can probably be at least partially achieved with some time/effort.