This is a headphone cable with a Φ4.4mm balanced connection terminal, developed in collaboration between Sony and KIMBER KABLE. I purchased it in April 2024 at Bic Camera Shibuya East Exit store, but I am selling it because I have never had the opportunity to use it (it is unused). I will also include a musashino LABEL EVA semi-hard earphone case that I purchased at the same time (photos 5-6). Thank you for your consideration.