Hi I honestly can't tell you if you can send it back... I am very happy with the product I use it every day and it works great. Contact Galaxus..

Very comfortable to wear, you hardly feel it, it stays in place without moving and without tightening. Sweatproof, no connectivity problems in my experience.

Yes, I have had no problems so far and the sound quality is amazing

As far as I know, they are not completely waterproof like the OpenSwim. However, the OpenSwim do not have a Bluetooth connection. I am not 100% sure about the waterproofness of the OpenRun. I just think that the connection point for the charging cable and the buttons are probably not waterproof.

After some research here are some other differences according to a comparison between the two models: "The Shokz OpenRun Pro is the improved variant of the Shokz OpenRun Bone Conduction. While both helmets are comfortable, the Pro comes with a better hard case to protect the helmet when not in use. They're also able to reproduce a bit more bass, though it's probably not enough if you like loud genres like EDM and hip-hop. That said, their companion app offers some EQ presets to help you adjust their sound. The OpenRun have a higher IP67 rating for dust and water resistance."

No, unfortunately the Aeropex Mini version is only intended for the American market, which is why we regret that we cannot offer it. Regarding your second question, due to different suppliers and delivery conditions, there may be price differences compared to other suppliers. We always try to set a price in line with the market, but this is not possible for all products.