Thank you for viewing. Metal Gear headphones. This is a new, unopened item, but please understand that it has been stored for a long time before purchasing. METAL GEAR SOLID HD EDITION ORIGINAL HEADPHONE Driver: 40mm large-diameter magnet Impedance: 40Ω Output sound level: 110dB Frequency response: 20-20KHz Please understand that recycled materials will be used for shipping packaging. If you have any other questions, please feel free to ask in the comments. I may not be able to ship immediately due to work. ◆I am not used to this, and I may cause you some inconvenience, but thank you for your understanding.