Sony WF-1000XM5 RIGHT EARBUD ONLY Black - Tested! The earbuds hold a charge, pair to my phone, and play audio well. I don't have any brand new Sony WF-1000XM5 to compare to, so I can't guarantee they sound exactly as they should. Based on how they sound with mono audio on I assume they haven't lost any audio quality when compared to how they sound new.