This is a first-generation product. Purchased from Rakuten Bic in October 2023. It has been stored in good condition. Since it is unopened, the condition has not been confirmed, and there is no warranty. Therefore, returns or refunds are not possible even if there are initial defects after opening. Please understand this before purchasing. BOSE Fully Wireless Earbuds QuietComfort Ultra Earbuds Black QCULTRAEARBUDSBLK B02310N