For maximum comfort, use PC headphones with earcups and a soft, padded headband. Improved Audio: Take advantage of high-end sound quality. System requirements include Chrome OS or MAC OS X (10.2.8 or later), Windows Vista, Windows 7, Windows 8, Windows 10, or a USB-A port. Cancelling Noise Characteristics: For crystal-clear calls, a rotating microphone reduces background noise, Headset frequency response: 20 Hz to 20 KHz Advanced USB digital technology: Digital audio is improved by laser-tuned drivers. Any PC or Mac with a USB-A port or adapter can use this plug-and-play headset without the need to install any software. Line-Up Controls: Use the headset cable to mute your microphone and change the volume. USB Connectivity: When you're ready, plug it in using a straightforward USB connection. Upgrade to the Logitech H540 headset for on-ear and high-definition audio.