Length: 1.8M Spring Extension about 5M. Jack:Dual 2.5mm to 3.5mm & 6.3mm Adapter. length: 1.8 M, spring extension about 5 M. this cable has dual 2.5mm male that be putted into headph ports, it the headph with dual 2.5mm plug, it doesn't fit the latest version of HE400i that with dual 3.5mm male plug or doesn't fit the latest version of HE560 with dual 3.5mm male plug.
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