SONY WF-1000XM3 wireless noise-canceling earphones. The earphones' batteries have been replaced with new ones. To ensure the next user can enjoy them for a long time, both the left and right sides have been replaced with new batteries, not just one side. When listing, the internal components were disassembled and cleaned with an air blower and alcohol disinfection, and the contact points were cleaned. The items for sale are the earphones and charging case (as shown in the first image). The firmware is currently updated to the latest version. Please understand that this is a used item. Please check the appearance from the images. If you are looking for a perfect product, please purchase one with a manufacturer's warranty. Shipping will be via Rakuraku Mercari delivery, which is fast and provides tracking information. As it is an anonymous delivery service, it is safe for those concerned about personal information such as their address and name.