NTT sonority nwm (ヌーム) MBN001 WHITE BEIGE Wireless Earphones, Neckband Type Brand new, unused, and unopened. Ear Speaker 【A New Experience: Ear Speaker "Ear Speaker"】 Play, work, anytime, wear it all day long. NTT developed this neckband wireless ear speaker, equipped with PSZ technology to suppress sound leakage. It uses durable yet soft nylon material. Lightweight and comfortable with a shape that puts less strain on the ears. Furthermore, the maximum playback time is 20 hours (when playing music), making it stress-free all day long. 【Achieves High-Level Sound Leakage Suppression: Equipped with NTT's "PSZ Technology"】 Equipped with proprietary PSZ (Personalized Sound Zone) technology (patent pending). Minimizes "sound leakage," a weakness of open-ear types. You can enjoy online meetings and your favorite music without worry, even in quiet places. 【Like a Speaker, Even Though It's an Earphone. Premium Sound That Feels the Space】 A 12mm diameter driver optimized for open-ear types. It uses a carbon fiber diaphragm that delivers rich tones, achieving clear mid-high frequencies, well-defined bass, and premium sound that feels the spaciousness. Furthermore, it supports multi-point connection, so there's no need to switch connection destinations. You can connect to two devices simultaneously, such as a computer and a smartphone.