About this item Replacement Audio upgrade HIFI Cable for HD4.40 / HD 4.40 BT / HD4.50 / HD 4.50 BTNC / HD4.30i / HD4.30G / HD400S Headphones Length: 3 meters (9.9 ft), package includes: 1 replacement cable (headphones not included) Cable Diameter: 4 mm, cable material: the inside cable is OFC wire, the outside cable is Braided Tangle-Free cable Jack: 3.5 mm Male & 6.35 mm adapter to 2.5 mm Male (comes with the lock the same as the Original cable) The 2.5 mm end on this cable is only compatible with HD4.40 / HD4.40 BT / HD4.50 / HD 4.50 BTNC / HD4.30i / HD4.30G / HD400S Headphones Dimensions: 3.94 x 1.18 x 0.39 inches