Features: Multifunction The sound card combines three functions, make your device have more possibility. Support listening and talking simultaneously Headset, microphone and earphone can be used in combination, two-person can talk simultaneously, meet different requirement. High Compatibility Type C port for Apple MacBook 12, Apple MacBook Pro 2015/2016/2017 and other Type-C supported devices. Drive free It works without battery or driver, just plug it then you can use. Simple and High-Quality Alloy Shell Design High-efficiency heat dissipation, light weight, resistance to compression and durability. Short pure copper core wire won't interfere with the use of other ports. Note: The device can read one card only is either slot every time.