Bone Conduction Headphones

I mistakenly ordered the S821mini version, fearing that they would be too small. But when they arrived, they fit perfectly, and there was even some extra left over.
Regarding the delivery, it arrived quickly in its original packaging, which was slightly dented at the corners (but it's going to be thrown away anyway). Headphones for the Chinese market, the language can be changed to English either on the headphones themselves or through the app, which is more intuitive and easier to use. In the app, you need to set the region to the USA for all equalizer presets to be available.
In general, they are no different from the "European" version, which we sell at an inflated price.
Feel free to take it. The seller responds to questions quickly and even sent me a photo comparing the mini and regular versions when I came to my senses.
I recommend it.

Very good product, as described. Everything is fine, fast delivery.

Spectacular. Although the box comes in Chinese, they are original. You have to change the language to English. And they charge very quickly. The only thing is that they are a bit thicker than the Shokz Open Run Pro, which were the ones I had previously. But they work very well.

I am very happy with this model. I had the previous one, but this one is even better. The brand is original, the real one. It comes with a serial number that, when you download the app to your phone and register it, gives you access to change the language and even fine-tune the sound by easily adjusting the treble, bass, etc. I bought the mini version of the headband so that it fits better on the head. It charges quickly and has a battery life of more than 10 hours. Highly recommended and, without a doubt, worth paying what it's worth.

I've been looking for sports earphones lately and tried the Shakes Open Run Pro 2, and it definitely feels completely different from regular earphones.
First of all, the biggest advantage is that the design does not block the ears, so you can hear all the surrounding sounds. When running or riding a bike, I felt much safer because I didn't miss the sounds of vehicles or people.