Brand new, unused item. Bubble wrap packaging, free shipping. Japanese instruction manual included. Reliable and safe, RoHS, FC, and CE certified. 0928 【Industry-Leading Bluetooth 5.3 Technology & Automatic Connection Upon Opening】The "M52-ENC" Bluetooth earphones utilize 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. You don't need to take the earphones out. After the initial manual connection, the next time you use them, they will automatically power on and connect with just one step: opening the lid. This provides a more comfortable user experience than other earphones with the same specifications. 【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, and usage environment). The design also includes an easy-to-read 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 & Comfortable Fit】These wireless earphones maintain the same compact size while significantly improving functionality and sound quality. 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 results in 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】Featuring IPX7 waterproof performance, these earphones are resistant to sweat and splashes, so you can use them with confidence even in sudden rain or when sweating during intense exercise. Suitable for all weather conditions.