DuoSet headsets offer hands-free communication in two configurations. Your hands are free for multi-tasking, whether you use it in over-the-ear or over-the-head configuration. The headset is comfortable and secure, and provides excellent sound quality. As with all Plantronics office headsets, the DuoSet features Plantronics patented Sound Guard Plus and Call Clarity technology. The noise-canceling models of DuoSet are ideal for use in situations where background noise interferes with clear communications.