This is the nwm MBN001 open-ear speaker. The color is dark brown. It features PSZ technology developed by NTT to suppress sound leakage, and is a neckband wireless ear speaker. It uses a durable yet soft nylon material. It's lightweight and comfortable with a design that puts less strain on the ears. Furthermore, it has a maximum playback time of 20 hours (when playing music), allowing for all-day stress-free use. Unused and unopened. Thank you for your consideration. Brand: nwm Wearing style: Both ears, integrated left and right Earphone/Headphone type: Ear-hook, clip-on, neck strap type Color: Brown系 (Brown-based) Wireless/Wired connection: Wireless Earphone/Headphone features: Microphone, Waterproof, splash-proof, Remote control High-frequency range (kHz): 20.0 kHz Wireless standard: Bluetooth Bluetooth codecs: AAC, SBC IP rating (waterproof rating): IPX5 Drive system: Dynamic type Driver size (mm): 12.0 mm Charging time: 2.0 hours Weight (g): 23.0 g ★ Available for immediate purchase ★ No price reduction