I am selling this item because I found it while cleaning. This is a set of the "right ear (R)" and "charging case" that I have left, as I have lost the left ear. 【About the condition】 Operation has been confirmed. Charging, pairing, sound output, and touch operation all work without any problems. I also checked the battery life when listing the item, and there is no extreme wear and tear, so it is in good condition. Both the case and the main unit do not have any noticeable large scratches and are in relatively clean condition (in good condition), but please check the photos as they are used items. 【Included items】 ・Right ear unit (R) ・Charging case ・Ear tips ※The left ear unit, outer box, and charging cable are not included. 【About ear tips】 The ear tips currently attached are used ones. They have been cleaned with alcohol, but if you are concerned about hygiene or do not need them, please let me know "ear tips not needed" after purchase, and I will remove them and ship only the main unit and case. 【※Important: About settings】 If you are using this with your other single ear (left), you will need to perform an **"initialization (reset)"** operation after arrival. 1. Put both earphones in the case 2. Press and hold the touch sensors on both the left and right sides simultaneously for 10 seconds or more 3. Release your fingers when the light flashes red (complete when it flashes green 4 times) This is the procedure. ※We cannot guarantee any problems such as pairing failure due to differences in firmware versions, so please purchase only if you understand this. (If you have any questions about the version, please comment) Instant purchase is OK. I will pack it carefully and ship it. #SONY #Sony #WF1000XM4 #WirelessEarphones #SingleEar #ChargingCase