Clearchat comfort usb headset features an adjustable, padded headband and plush ear pads for outstanding comfort. Digitally enhanced usb audio provides superior sound clarity. Noise-canceling microphone blocks unwanted sounds even in a noisy room. Convenient in-line volume and mute controls offers easy access. Rotating microphone boom swings out of the way when not in use. Headset frequency response is 20 hz-20 khz. Microphone frequency response is 100 hz-10 khz. Headset includes an 8ft ' cable. Headset plugs into a usb 1.1 Or 2.0 Port and is compatible with windows 2000, windows xp, windows vista and mac os x 10.2.8 Or later.