1The twisted pair twists the hot and cold signal wires to offset the magnetic flux caused by the current and reduce signal transmission loss. 2Reduce the influence of current noise caused by the external magnetic flux through the connecting wire, and realize HD sound. 3The core OFC copper wire has good electrical conductivity, bright and shiny surface, and has high corrosion resistance. 4OFC copper wire can improve the resolution and separation of the earphones and eliminate the dull feeling of the earphone bass. 5Make the sound more transparent, natural and beautiful, restore the real sound, let you have a different listening experience. 6Unstretched is about 1.5m/4.9ft, and straightened about 6m/19.7ft, the left side is long and the right is short, the long line should be bypassed from the head beam. Item Type:Headphone Audio Cable with Adapter Material: Oxygen-Free Copper + Bare Copper Wire Color: As Picture Shown Cable Unstretched Length: Approx.1.5m/4.9ft Cable Stretched Length: Approx.6m/19.7ft Weight: Approx. 105.0g/3.7oz Theleftsideislongandtherightisshort,thelonglineshouldbebypassedfromtheheadbeam Product Plug: 3.5MM stereo distribution 6.35MM conversion head Applicable Products: The playback audio source interface is national standard 3.5mm, which can be compatible with mainstream equipment on the market. Plug and play Fit forSennheiser HD 25-sp/HD 222/HD 224/HD 230/HD 250/HD 250 Linear II/ HD 414/HD 414 SL/HD 420/HD 420 SL/HD 425/HD 430/HD 440 II/HD 442 II/HD 450 II/HD 480 Classic/HD 480 CL-II/HD 480 II/HD 490 II/HD 520/HD 520 II/HD 530/HD 530 II/HD 540/HD 540 II/HD 560/HD 560 II 1 x Headphone Audio Cable 1 x Adapter