Sony Wireless Stereo Headset WH-CH520 Beige Brand new, unopened Structure: Sealed Wearing style: Both ears, integrated left and right Earphone/Headphone type: Headband Color: Beige Earphone/Headphone features: Microphone, Sound quality adjustment, Remote control Low-frequency range (Hz): 20.0 Hz High-frequency range (kHz): 20.0 kHz Bluetooth codec: AAC, SBC Wireless/Wired connection: Wireless Drive method: Dynamic type Driver size (mm): 30.0 mm Wireless standard: Bluetooth Wireless features: Multipairing Charging port: USB Type-C Charging time: 3.0 hours Weight (g): 147.0 g *Since this is an unopened product, please direct inquiries and warranty issues to the manufacturer or the retailer. We are unable to handle initial defects, etc.