Product Name: SONY WF-1000XM4 Wireless Earbuds - Black Product Condition: * There is some wear and tear, but overall, they are in relatively good condition. * Operation has been confirmed, but the battery of the right earbud drains quickly. (The left earbud and case can be used without any problems) * There are no problems with sound quality or connection. Accessories: * Earbud body (left and right) * Charging case (All items shown in the photos are included) Important Notes: * Please refrain from purchasing if you are sensitive to used items. * Please purchase only if you understand the issues described. Recommended Points: * This is a very popular model from SONY, with very high noise-canceling performance. * The only issue is the battery of the right earbud, so it is also recommended for single-ear use, repair, or parts. * We are offering it at a reduced price accordingly. * Negotiation possible.