I bought these new because I liked the look, but I'm selling them because the sound quality wasn't to my taste. Usage period: 1 day Usage time: Approximately 3 hours All accessories included. I think there's little degradation in quality since they were opened recently, but please consider this only if you understand that they have been used by another person. They have detachable plugs, and you can switch between 2.5mm, 3.5mm, and 4.4mm. Please research the color and performance in detail. Thank you for looking.