I have a New in Box BMW Motorrad Communication system BMW Part number 76518568247. It is designed for the Carbon 7 helmet, but if you are skilled you can retrofit it into just about any helmet. I did one into my Carbon 7 and another into my Shoei. I was going to put this one in my Schuberth but decided to just leave the older version in place. New they are going for $460. I will let this one go for $350 shipped to the lower 48. Comes from a non-smoking COVID-19 free house.