Wireless Earphones T12 (Used item) No box or instruction manual. Functionality confirmed. No issues with left/right volume balance. Used for approximately 10 minutes after purchase. Unknown usage period and frequency before purchase. Please consider that there may be some scratches and dirt as it is a used item. Please refrain from purchasing if you are looking for a perfect item. Returns and refunds are not accepted, so please confirm any concerns in advance or purchase after carefully reviewing the description. I will block those who ask for price reductions, offer significantly reduced prices, have concerns about the transaction, or have many negative reviews. I do not offer holds or exclusive sales. I will prioritize the first person to purchase, even during negotiations or Q&A. I will pack with recycled materials. My packaging skills are not professional. Measures to prevent item substitution are in place. Please also check my profile.