This is a headphone from Otareco. I am selling it because I don't use it. The box is also unopened. Regular price: 9800 yen Type: Closed-back dynamic stereo headphones ・Driver unit: 40mm ・Impedance: 32Ω ・Frequency response: 20～20,000Hz ・Weight: 160g (without cord) Accessories ・Headphone cable (SPYDER SILK) ・Conversion plug (stereoMINI - stereoPHONE)