Sony WF-1000XM4 Black Earphone Left Side (L) Only *This item is being sold as junk because it does not power on.* Please understand that this is a used item and may have small scratches or stains that cannot be removed. Please consider this item as a parts-only junk item. --Regarding Pairing-- How to Initialize 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 light (red) starts flashing. The light (green) will flash 4 times, and the headset will be initialized and reset to factory settings, deleting all device registration (pairing) information. After that, you can pair and use the device. Search Keywords #WH-1000XM