These are open-back headphones featuring planar magnetic drivers. The box has some minor damage, but the item is new and unopened. These headphones retail for around 50,000 yen, but I had another pair I preferred, so I kept these as a spare. I am selling them now to organize my belongings due to a move. I have also listened to these at an earphone specialty store, and I believe the sound quality is very satisfying at this price point. Type: Headphones Connection Type: Wired Wearing Style: Over-Ear Driver Type: Planar Magnetic Plug Shape: Standard plug 6.35mm / Mini plug 3.5mm Impedance: 20 Ω Sound Pressure Level: 94 dB/mW Frequency Response: 10Hz～40kHz Thank you for looking.