This is a junk item. Please consider it for repair, parts, or with the understanding of functional limitations. Also, please refrain from extreme price negotiations or complaints after purchase. I used it indoors for work for about 4 years. The ear pads were replaced just 3 months ago. The audio playback works perfectly fine. ANC also functions well. The sound quality has not deteriorated. There are no audio dropouts. The problem is with the microphone. Even when I lower the microphone, it becomes "muted," and there are frequent occurrences where my voice is not heard, even though the Teams icon is lit up. Sometimes it works by joining and leaving Teams meetings or raising and lowering the microphone, but it's at a level that makes it difficult to use for work, so I'm selling it. Also, there is a crack in a part of the main body. It has been repaired with tape. I'm selling it as is because it might look messy if I peel it off. There is no original box, but I will include the dedicated pouch. I think the charger and receiver alone would cost nearly 20,000 yen new. Thank you for your consideration.