Sennheiser DeskMate Single-Ear Corded Office Headset. Most Comfortable Headset in the World. Includes 4-year Warranty The DeskMate is the most comfortable corded office headset in the world The perfect fit  the adjustable headband will give you a great fit every time Quick Disconnect cable allows you to quickly disconnect from your phone or amplifier while still wearing your headset Features a noise-canceling microphone  make sure your callers hear you and not what's going on around you Unparalleled 4-year full-replacement warranty