beyerdynamic DT770 PRO LIMITED BLACK EDITION, a limited edition color. I unboxed, wore, and tested the sound only once for a product comparison video on YouTube. Therefore, it's not completely unused, but I would appreciate it if you could understand that. [Brand] beyerdynamic [Model Number] DT 770 PRO [Color] Black DT770PRO 80Ω Brand: beyerdynamic Construction: Closed-back Wearing Style: Over-ear, integrated left and right Headphone Type: Headband Color: Black Low-Frequency Response (Hz): 5 Hz High-Frequency Response (kHz): 35 kHz Wireless/Wired Connection: Wired Driver Type: Dynamic Sound Pressure Sensitivity (dB): 96 dB Cable Length (m): 3 m Weight (g): 270 g