Get clear sound and simple solutions with the Microsoft LifeChat LX-4000 Headset for Business. It features a monaural headset with a noise-cancelling, 270° adjustable boom mic. The 85.6" cable is equipped with in-line mute and volume controls. The headset is sturdy, lightweight and comfortable. After a few minutes you'll forget you're even wearing it and the high-quality audio and noise-cancellation feature will make it feel as if you're right next to the person on the other end of your call. All you need for compatibility is a PC that has Windows XP, Vista or 7. There's no software required. For added flexibility, the LifeChat LX-400 is Skype certified and optimized for Microsoft Lync.