This is a SENNHEISER HD265 Linear. I found and purchased it on an auction site some time ago. I'm selling it because I haven't used it much. The original headband was crushed, so I replaced it with a headband for the HD650. The length is slightly different, but it works without any problems. Also, the included cable has been modified to 4.4mm balanced. Sound is produced without any issues. As a bonus, I'm including an adapter that converts the Sennheiser 2-pin plugs (for HD265/HD650, etc.) to MMCX and CIEM 2-pin plugs, which are sold on Amazon. (It costs nearly 3000 yen.) I am also listing this on other sites, so it may be canceled. Thank you.