The best outcome is just to change the name right now and be careful not to violate trademarks and avoid any chance of conflict. They won’t be sued if they hurry to rename it to something generic, change the domain name, change the wording to say “compatible with headphones made by Bose”, include prominent text that says “Bose is a trademark of Bose Corporation and this product is not endorsed or supported by them in any way”, stop using their trademarks incorrectly (some instances are improperly lowercase), etc.

They can even redirect the old domain to the new one for a while. A company like Bose is not going to punish a mistake that was corrected in good faith in a timely manner.