SONY WF-1000XM4 true wireless earbuds made by Sony. I no longer need these as I have purchased different earbuds. They were working normally until recently, so they should function without any problems. Purchased in February 2023 and still under a 5-year warranty, so you should be able to use them for a long time. They have been kept in a case since purchase, so there are no major scratches, but there are many minor scratches from use. The ear tips have been replaced since purchase, so the original accessories are likely unused (however, there is some aging, so I recommend using different ones). Overall, there is a feeling of use and some dirt, so please purchase only if you understand this. All accessories are included. As a bonus, I will include new ear tips (one S and one SS each). ◆ Product Overview These earbuds are one of SONY's flagship wireless earbuds, offering an excellent balance of sound quality, noise-canceling performance, and wearing comfort. They are in-ear type, so there is less sound leakage, and you can enjoy music while suppressing external noise. They feature a wireless design with Bluetooth connectivity and no cables, and come with a charging case for easy charging on the go. ◆ Sound and Sound Quality SONY's unique technology enables high-quality sound reproduction even wirelessly. With LDAC codec support, high-resolution equivalent high bit rate transmission is possible with compatible smartphones and sound sources. In addition, the DSEE Extreme function is also equipped, which restores compressed sound sources (such as MP3 and streaming music) to high-quality sound close to the original sound through upscaling. You can experience clear sound with a good balance from low to high frequencies. ◆ Noise Canceling (NC) Performance Equipped with an industry-acclaimed active noise-canceling function, it suppresses noise in trains, cafes, offices, etc., allowing you to concentrate on music and videos. It also supports ambient sound mode and quick attention, allowing you to respond without removing the earbuds when you want to talk or hear the surrounding sounds.