※ Item is without the original box. Price negotiation is OK as the condition is not great. I've only used it about 5 times since I bought it, and then stored it away from sunlight. However, the ear pads have deteriorated badly, and bits of fabric-like debris are falling off. I saw similar comments in the Amazon product reviews, so I think it's a product that tends to deteriorate easily. ※ Please read the details carefully as returns and refunds are not accepted. ATH-DWL770 Brand: Audio-Technica Structure: Closed-back Wearing style: Over-ear, integrated left and right Headphone type: Headband Color: Black Headphone features: Hi-Res, Microphone, Sound adjustment, Auto power off function, Surround sound, Remote control, Detachable cable Low-frequency response (Hz): 5.0 Hz High-frequency response (kHz): 40.0 kHz Bluetooth version: Bluetooth 4.2 Bluetooth codecs: aptX, AAC, SBC Wireless/Wired connection: Wireless, Wired Driver type: Dynamic Plug shape: Mini plug Impedance (Ω): 32.0 Ω Sensitivity (dB): 99.0 dB Driver size (mm): 42.0 mm Wireless standards: 2.4GHz band wireless, Bluetooth Wireless features: Multi-pairing Charging port: MicroUSB Charging time: 4.0 hours Cord length (m): 1.2 m Weight (g): 257.0 g