SONY MDR-CD900ST studio monitor headphones (sealed type). They show signs of use, but the ear pads have been replaced with high-quality YAXI ones and are in relatively new condition. They will be shipped in the original box. There are no issues with the operation. This is a well-known, classic model, widely used for DTM, home recording, mix checking, and more. I'm offering this standard model at a reasonable price. Please check the condition in the photos. Instant purchase is OK.