Feature●USB external sound adapter adds a mono microphone-in and a stereo audio-out port to your computer through a USB port●Please kindly note it only supports mono microphone TRRS (4pin) jacks, it does not support TS (2pin) or TRS (3pin).●PLUG&PLAY - no driver or external power required for USB audio sound adapter (USB bus-powered)●1 YEAR WARRANTY on any issue with the sound adapter usb - just contact PowerDeWise supportDescription