Brand new, unopened. This product typically retails for approximately 17,880 yen (tax included). Bone Conduction Technology: Transmits sound vibrations directly to the inner ear through the cheekbones, eliminating the need to cover the ears, thus enhancing safety during outdoor activities like running and cycling. IP67 Waterproof and Dustproof Performance: Resistant to sweat and dust, allowing use during intense workouts and in rainy conditions (not recommended for swimming). Quick Charging: A 10-minute charge provides up to 1.5 hours (or 90 minutes) of playback, and a full charge allows for approximately 8 hours of continuous playback. Lightweight and Comfortable Fit: Extremely lightweight (26g) and can be used with glasses, but some users may experience slight pressure on the temples during prolonged use. Bluetooth 5.1: Supports stable connections and multi-point pairing (simultaneous connection to two devices).