Adjustable Design : The lightweight headband of the headphones ensures hours of comfort when working, calling or listening USB Connectivity : No installation required, simply plug the USB connector into your device and you’re ready to start working In-Line Controls : Easily adjust your volume and mute with the handy controls on the cable of your PC headset Noise-Cancelling Microphone : Minimise background noise with the boom microphone and rotate into place for the best voice capture Clear Digital Sound : Confidently call, listen and game with stereo sound quality Upgrade to H600 for wireless freedom