Replacement Audio upgrade HIFI Cable For Sennheiser HD4.40 / HD 4.40 BT / HD4.50 / HD 4.50 BTNC / HD4.30i / HD4.30G / HD400S Headphones Length: 1.2meters(4ft), package include: 1*replacement cable ( there is no headphone included ) Cable Diameter : 4mm,cable material:the inside cable is OFC wire,the outside cable is Braided Tangle-Free cable Jack : 3.5mm Male & 6.35mm adapter to 2.5mm Male(comes with the lock the same as the Original cable) The 2.5mm end on this cable is only compatible with Sennheiser HD4.40 / HD4.40 bt / HD4.50 / HD 4.50 btnc / HD4.30i / HD4.30G / HD400S Headphones Replacement Audio upgrade HiFi Cable For Sennheiser HD4.40 / HD 4.40 BT / HD4.50 / HD 4.50 BTNC / HD4.30i / HD4.30G / HD400S Headphone Extension Cords