DeskMate Single-Ear Universal Office Phone Bundle The ultimate in versatility  the included UI 770 amp allows you to connect to your phone and computer at the same time Unparalleled comfort  with a leatherette ear cushion, flexible headband and German design, the DeskMate is the most comfortable headset in the world 4-year full-replacement warranty  the best of any corded headset available Noise-canceling microphone  keeps your callers from hearing what's going on around you