Wide applicationvirtual 7.1 channel devices like headphones, headset or microphones that stop working or have issues with output cutting in and out. ^ Louder previous-soundLouder the sound that computer cannot do by itself, create surround sound effect which will bring you fantastic feelings. ^ No driversUSB sound card is easy to use, no extra drivers is needed. Plug and play for instant audio playback. Microphone/Headphone mute design makes the headset and speaker mode switch freely without unplugging anything from the computer. ^ Mixer functionMixer Function can adjust the output electronically level. Functional keys including microphone-mute, speaker-mute and volume-up/down roller.^ Operating systemThe External USB 2.0 Sound Card Adapter can work with all major operation systems portable size makes it convenient to take everywhere.