Slick, comfortable, and awesome quality, the AC-840 USB mono headset is a great choice for anyone doing VoIP. Bring your ears to attention with the AC-840?s 30mm dynamic driver. The adjustable, over the head design fits comfortably on any head size, and the flexible, noise-canceling boom mic?s 180-degree rotation gets the job done, no matter your preference. The in-line volume control and mute switch are conveniently located within reach, and comfort is no issue with the AC-840?s soft, leatherette ear pad. Chat in style.