The lightest, most comfortable over-the-ear headset, the TriStar headset, offers premium sound quality and is the first to combine light weight and small size with a unique design to provide optimum over-the-ear fit. The TriStar NC headset is also available with the added benefit of a noise-cancelling microphone, eliminating background noise by up to 75%. With its simple design, replacing the voice tube or earpiece is quick, cost-effective, and takes only seconds. TriStar headsets are ideal for executives, call centers, and help desks, as well as technical helplines, credit control, sales offices, and telemarketing. Icluded in this package is an M12 Vista Universal Amplifier to connect Plantronics headsets to just about any modular single- or multi-line phone and offer ergonomically designed volume, headset/handset, and mute controls.