Please be sure to read the description before considering a purchase. This is a used item. It is a junk item. Pairing is possible, and there are no problems with the sound quality. However, the right earphone cannot be charged and can only be used for a short time, so it is listed as a junk item. Although it is used, the SAO collaboration version is rare and hard to find. It should be usable without problems if you send it in for repair. If you like it, please do! Please purchase only if you understand. ◆ We will prioritize those who purchase first, even if there are comments. Condition: There are stains and small scratches. Please check the condition in the photos. Please refrain from purchasing if you are sensitive to these issues. Anonymous shipping. ◆ Please note that we are not responsible for any damage to the product during shipping. ◆ Please consider that the product may have material degradation, unnoticed discoloration, or scratches due to aging.