I am selling these headphones because I purchased a new pair. I bought these several years ago and used them occasionally, so they are in good condition with no noticeable deterioration. I have confirmed that they are working. I will disinfect them with alcohol before shipping. Please understand that these are used items. I am sorry, but I would appreciate it if you could purchase them with no claims and no returns. ※ I do not smoke, and I do not have any pets. The next-generation model of the world-renowned M50 High-resolution monitor headphones that meet the needs of professionals. ● High-resolution playback with a large-diameter, high-power φ45mm CCAW voice coil driver. ● Elliptical earcups enhance sound isolation for comfortable monitoring even during extended use. ● 90-degree reversible monitoring mechanism for single-ear monitoring. The 90-degree reversible monitoring mechanism is convenient when monitoring with the headphones around your neck. ● Newly adopted head pad and ear pad materials for high durability. ● Detachable cord (bayonet lock mechanism) for easy maintenance. ● Folding mechanism for convenient portability. ● Ideal for studio recording and mixing. High-resolution monitoring with a wide-band, flat characteristic unique to monitor headphones. Recommended for DJs and track makers. Type: Closed-back dynamic Driver: φ45mm, CCAW voice coil Output sound pressure level: 99dB/mW Frequency response: 15～28,000Hz Maximum input: 1,600mW Impedance: 38Ω Weight (excluding cord): 285g Plug: φ6.3mm standard / φ3.5mm mini gold-plated stereo 2-way Thank you for viewing.