One owner since new. The right earbud can be paired and its functionality has been confirmed, but the left earbud cannot be paired, so it is considered junk. Would be suitable for parts. The ear tips are unused, so I will include them, although they have been stored at home. Charging works without issue, but please understand that the battery capacity may have decreased due to age. I haven't experienced or noticed any particular problems. The original box is also in good condition and I have it on hand, but I will include it for an additional 800 yen to cover shipping and handling. Please inquire in the question section. High-quality wireless earphones, made by Sennheiser. - Brand: Sennheiser - Type: Wireless Earphones - Color: Black/Silver - Accessories: Ear tips (6 pieces) Thank you for looking.