Feature●Convert your exist 3.5mm TRRS 4-Pole plug to USB plug headset for computer PC laptop softphone. Adapter supports listening + speaking functions.●Simply plug and play. The USB port will be automatically recognized by system in seconds. No driver download required, no external power required.●Wide Compatibility: Easy setup, plug and play. Support CTIA standards TRRS headsets and microphones. No system limitation.●Cable length: cable length up to 3.28 ft, 1 meter. Durable and strong.●IN-LINE function: This adapter includes in-line speaker mute unmute volume up down and microphone mute unmute button.Description