Thank you for viewing. Both earbuds have been replaced with new batteries, so they are in like-new condition. The replacement batteries are genuine Z55H batteries from the manufacturer, so there are no operational issues. During the battery replacement, both the interior and exterior were disassembled and cleaned with disinfecting alcohol. There are no noticeable scratches or stains, and I believe they are in beautiful condition. All accessories are included. Comes with a dedicated hard case and carabiner. The firmware has been updated to the latest version, 2.1.0, so it supports multipoint, which allows connection to multiple devices simultaneously. When shipping, I will initialize the device, clean it with disinfecting alcohol, and then pack and ship it promptly. Thank you. SONY #Sony Popular model... Sony WF-1000XM4 Type... Separate left and right Connection type... Wireless Features... Bluetooth, noise canceling, Hi-Res, microphone, waterproof, completely wireless (separate left and right) Release date: 2021/06/25 Sony model name... WF-1000XM4 Other features... Noise canceling