Features: Coaxial Four-unit Headset: Two vocal units are arranged in one to suppress the distortion of the driving unit, bringing perfect listening experience. Remote Microphone: Built-in Microphone enables hands-free calling. With one button in-line control, easy to control music and calls. Comfortable Wearing: 3 sizes of soft silicone earcaps guarantee wearing comfort and noise isolation. Ear-hook design reduces the burden to your ears. Strong Compatibility: 3.5mm gold-plated jack prevents oxidation and reduces signal loss, compatible with almost all 3.5mm audio devices. Detachable Repalcement Cable: Detachable audio cable with 2 pin 0.75mm gold-plated needle plug, tangle-free, excellent in appearence and performance.