Sound Intone CX-05 Headphones Stereo Adjustable Folding Headsets Stretchable Headband Headset Detachable Cable 3.5mm with In-line Microphone(Blue) This product uses zinc alloy metal technology developed especially for cars. It is pressure, wear, deformation, and corrosion-resistant. With retractable pull arm stainless steel in headset, sturdy and durable. Using passive noise cancelling function. Flexible and detachable audio cable design. One extra original nylon audio cable, Stereo gold plug 3.5mm is used, which guarantees that audio spread without distortion. Portable and foldable design, which saves space. The fold parts of every product are connected by metal. Destructive test shows that this product tolerates at least more than 10,000 times of folding. Earmuffs and head beam inside use top leather and memory sponge,feels soft and comfortable, and scaling and damage of headphone earmuffs and head beam is prevented. Head beam outside uses the fabric technology to make headphones have a sense of fashion also wear-resistant and durable. Adjustable headband ensures that it is suitable to heads in different forms. Audio cable is also equipped with 360 highly sensitive omni-directional microphone (to show effects of anti-interference and 360 high pickup), and with one intelligent button (to answer and hang up the phone, pause and play music).