Sony WF-1000XM4 Black Earphones (Both Ears) ※ Complete set of both ears for peace of mind ※ Cleaned and maintained ※ Operation confirmed ※ Pairing confirmed We have confirmed the above, so please purchase with confidence. Immediate purchase without comments is also possible. If you have lost one earbud or want to revive your earphones, please consider this. Battery operation has been confirmed for over 1 hour. Battery life duration has not been confirmed. Please note that the battery is a consumable item and is not covered by warranty. Due to being a used item, there may be small scratches or unremovable dirt. Please understand that this is a used item before considering a purchase. -- Regarding Pairing Method -- Initialization Method With the headset in the charging case and the lid open, touch and hold both the L and R touch sensors for about 10 seconds. Release your fingers when the headset's lamp (red) starts flashing. The lamp (green) will flash 4 times, and the headset will be initialized and returned to factory settings, deleting all device registration (pairing) information. After that, you can pair and use it. Search Keywords #WH-1000XM iPhone 15 PRO iPhone 14 PRO iPhone 13 PRO iPhone 12 PRO iPhone 11 Pro iPad 256