This is a SONY WF-1000XM4! Version 2.0.1. This is for the right earbud only. I am selling this due to battery degradation. It only lasts for 1 hour when connected to one earbud. I've included a photo for reference. There are no other issues with the product besides the battery, I have confirmed this. --Pairing Instructions-- 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 indicator light (red) starts flashing. The light (green) will flash 4 times, and the headset will be initialized, returning to factory settings, and all device registration (pairing) information will be deleted. After that, you can pair and use it.