The Cyber Acoustics AC-840 Internet USB Mono Headset is an adjustable, over-the-head style headset that can be worn on your right or left side. It connects via USB to a PC or Mac. Featuring a 30mm dynamic driver, the headset makes an ideal choice for Voice over Internet Protocol (VoIP). It has a flexible noise-cancelling boom mic with in-line volume control and a mute switch. The mic can be rotated 180 degrees for convenience. Additionally, the headset is outfitted with a leatherette earpad for comfort.