This is an authentic product, purchased new at Yodobashi Camera. It has been used infrequently and is in very clean condition overall, with no noticeable scratches. I've used various earphones before, and I felt that the noise-canceling performance is undoubtedly top-level. It powerfully blocks out surrounding sounds, allowing you to fully immerse yourself in the world of music and video. Also, the powerful bass unique to Bose is very satisfying, and I think it's a top-class earphone in terms of both sound quality and immersion. I am currently using a different pair of headphones as my main ones, so I'm putting this up for sale while it's still in good condition.