Brand new, unused item. Bubble wrap packaging, free shipping. Japanese instruction manual. Reliable and safe RoHS, FC, CE certified. 1012 【Industry-Leading Bluetooth 5.3 Technology - Automatic Connection When the Lid is Opened】"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" on your smartphone's Bluetooth and click to connect. No need to take the Bluetooth earphones out. After connecting manually for the first time, when restarting, the power turns on automatically when the lid is opened, and it connects automatically in just one step. We will provide a more comfortable user experience than other earphone models 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). Also, a clear LED display is designed, allowing you to check the charging status of both left and right earphones, and the remaining charge of the charging case is clearly displayed in numbers from 1% to 100%. 【High-Quality Sound Equivalent to ENC Noise Cancellation, Yet Fits Comfortably in the Ear】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, so you can dynamically enjoy mid-high and low frequencies. Especially at 50% volume, you can feel the depth and impact of the bass. This provides a high-quality call experience. Perfect for online courses and meetings! Enjoy a clear call experience you've never had 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. 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 peace of mind even if it gets wet from sudden rain or sweat from intense exercise. Applicable to all weather conditions.