Brand new, unused item. Bubble wrap packaging, free shipping. Japanese instruction manual included. Reliable and safe RoHS, FC, and CE certified. 1005 【Industry-Leading Bluetooth 5.3 Technology - Automatic Connection When the Lid is Opened】The "M52-ENC" Bluetooth earphones use a hall switch. When connecting for the first time, open the charging case of the earphones and search for "M52-ENC" in your smartphone's Bluetooth settings, then click to connect. No need to take the Bluetooth earphones out. After connecting manually for the first time, when you turn them on again, they will automatically power on and connect with just one step when you open the lid. We provide a more comfortable user experience than other earphones with the same standard. 【Up to 45 Hours of Playback - Clear LED Display】With a 500mAh large-capacity battery and an energy-saving design, the earphones can play for 6 hours on a single charge, and up to 45 hours with the charging case (playback time varies depending on volume, content being played, and usage environment). Also, a clear LED display is designed to easily show the charging status of the left and right earphones, and the remaining battery level of the charging case is clearly displayed in numbers from 1% to 100%. 【High-Quality Sound Equivalent to ENC Noise Cancellation, Yet Comfortable to Wear】These wireless earphones maintain the same compact size as before while achieving significant functional additions and improved sound quality. You can hear the details of musical instruments clearly, allowing you to enjoy mid-high and low frequencies dynamically. Especially at 50% volume, you can feel the depth and impact of the bass. This provides a high-quality calling experience. Perfect for online courses and meetings! Enjoy a clear call experience like never before. 【Touch Sensor - Easy Operation - Excellent Fit】With a single touch, you can easily control music playback/pause/skip forward/skip back/answer/reject calls/SIRI (voice guidance), etc., on the earphones. You can do everything with a single finger without taking out your smartphone, even when you're busy with online meetings, driving, housework, or package delivery. 【Fast Type-C Charging, Waterproof for Peace of Mind】With IPX7 waterproof performance, it is splash-proof and sweat-resistant, so you can use it with confidence even if it gets wet from sudden rain or sweat from intense exercise. Suitable for all weather conditions.