Brand new, unused. Wireless Noise Canceling Stereo Headset WH-1000XM6 (B) Black Brand: SONY Construction: Sealed Headphone Type: Headband Color: Black系 (Black-based) Headphone Features: Noise Canceling, Hi-Res, Microphone, Ambient Sound Mode, Sound Adjustment, Remote Control, Foldable Low-Frequency Response (Hz): 4.0 Hz High-Frequency Response (kHz): 40.0 kHz Bluetooth Codec: LDAC, AAC, SBC Wireless/Wired Connection: Wireless, Wired Connection Driving Method: Dynamic Plug Shape: Mini Plug Impedance (Ω): 16.0 Ω Sound Pressure Sensitivity (db): 102.0 db Driver Size (mm): 30.0 mm Wireless Standard: Bluetooth Charging Port: USB Charging Time: 3.5 hours Cord Length (m): 1.2 m Weight (g): 254.0 g