Features: If having the problems of sound card damaged, bad jacks and limited interface on laptop/tablet/phone, then the external sound card is a great solution for you. Allows you inserting two headphones to share the same audio, chat and listen with zero cutting in/out. No driver required, plug and play, compatible with Win XP/Vista/7/8/10, MacOS, Linux. Provides separated mute buttons for microphone and headset, you can mute either of them respectively. LED indicator stays red when microphone mutes, and stays blue when headphone mutes. Easy to control volume with a rotary knob, non-slip grain surface, smooth to adjust the volume. Offers you crystal clear audio and surround sound without buzzing. Support TRS, TRRS cables, suitable for most of headsets. Made of high-quality engineering plastics, it is solid, durable, and well-made.