1、[Support Type] Audio equipment supporting ordinary audio headset, microphone and 3.5mm interface 2、[Meet Demand] Multi interface and multi mode design to meet your requirements in different scenarios 3、[Good Performance] Plug and play, which can replace the traditional sound card of computer and notebook 4、[Scope of Application] Suitable for windows, for OS X, for PS5, for Linux, PC laptop desktop and other devices 5、[Many Functions] Support multiple EQ sound conversion. Easy to use, no external power supply, plug and play, no driver required Item Type: USB Extenrnal Sound Card Model: AM-U004 Material: Aluminum Alloy USB C Function: Computer USB2.0 Input, Connected to Desktop or Notebook USB Interface EQ Key: Short Press to Switch Between Three Kinds of Sound Effects (Default Sound Effect; Music Sound Effect; Movie Sound Effect) Headphone Hole: Connect Stereo Headphones Headset with Microphone: Connect Headset with Microphone Microphone Connector: Connect Wired Microphone 3 x USB: 3 USB Hub Interfaces (when the USB Interface is Connected to the Headset, the Microphone and EQ Have No Effect) FL  FR: Stereo Output Mode Coaxial: Coaxial Audio Output, Connected to the Power Amplifier with Coaxial Interface For Toslink: Optical Fiber Audio Output, Connected to the Power Amplifier with Optical Fiber Interface Volume: Analog Audio Volume Adjustment (Increase Clockwise and Decrease Counterclockwise) Compatible System: For Windows,  for OS X, for Linux and Other Systems 1 x USB Extenrnal Sound Card 1 x Data Cable