This is the SENNHEISER wireless headphones, MOMENTUM3 Wireless (model number: M3AEBTXL). I purchased it two years ago. However, there were periods when I didn't use it, so the actual usage period is probably about six months. I don't smoke, so it hasn't been used in a smoking environment. All accessories (outer box, storage case, charging cable, USB adapter) are included. I am selling it due to various circumstances, so I would like to pass it on to someone who will take good care of it. There are no noticeable scratches, but please understand that it is a used item.