Made of oxygen-free copper features with good conductivity and durability ensures good sound quality. The PVC outer tube is waterproof and pliable can offer optimal protection to the inner cord. Near the plug connecting part the cable is thickened to make the cable not easy to break and prolong its service life. Suitable for CD player computer TV various types of players mobile phone MP3 etc. One end is 3.5 mm jack plug the other is USB female interface suitable for most use when needs a adapter cable.