Brand new, unused item. Bubble wrap packaging, free shipping. Japanese instruction manual. Reliable and safe RoHS FC CE certification. 0929 【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 and click to connect. There's no need to take the Bluetooth earphones out. After connecting manually for the first time, when you restart, the earphones will automatically power on and connect with just one step when you open the lid. This provides 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 (usage time varies depending on volume, content being played, and usage environment). The design also includes an easy-to-see LED display, allowing you to check the charging status of both left and right earphones, and clearly displaying the remaining charge of the charging case 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 sound quality improvements. You can hear the details of musical instruments, allowing you to enjoy the 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 backward/answer/reject calls/SIRI (voice guidance), etc., on the earphones. You don't need to take out your smartphone even when you're busy with online meetings, driving, housework, or package delivery; everything can be done with a single touch. 【Fast Type-C Charging, Waterproof for Peace of Mind】With IPX7 waterproof performance, it is water-resistant to sweat and splashes, so you can use it with confidence even in sudden rain or when wet from intense exercise. Applicable to all weather conditions.