digital sound USB headset for computer , Professional inline with volume and mute controls , ... easy installation, plug&play , no driver needed , universal compatibility to PC and mac Digital audio /sound quality , ideal for voip , music ... ±4dBFrequency : 50-20000HzMax.Input Power : 100mWCord Length : around 2.0MConnection : USB 2.0 Professional USB headset with mute and volume control function