SONY Wireless Bluetooth Earphones Set of 2 ① WF1000XM3 Black ② WF1000XM4 Black [Condition] ① and ② were used infrequently and stored. Operation has been confirmed. ・Sound quality / noise canceling / touch operation / connection, etc., basic functions are not a problem. [Battery Life] Measured values in my usage environment. ① ・Left: Approximately 20 minutes ・Right: Approximately 2 hours ② ・Left and Right: Approximately 2 hours Additional photos can be provided. Due to lack of specialized knowledge, there may be errors in the description. Please check the photos for dirt, condition, etc. Please refrain from purchasing if you are a nervous person, as these items have been handled by someone else. [Notes] This product is intended for use on the premise of battery replacement, or for repair/parts. Please purchase only if you understand the current condition of the product. ● Please note that we do not accept returns under any circumstances to prevent replacement fraud.