DuoSet headsets offer hands-free communication. 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. It's easy to use quick disconnect feature places the caller on hold, while allowing users to leave their desk without removing their headset. The MO200 is a mobile corded headset with in-line hookswitch and mute controls. An intelligent redesign of the highly successful DuoSet, this headset picks up where it's predecessor left off. The MO200 is a convertible this means it can be worn with an earloop, or with a headband. Either way it will feel comfortable, look good and sound even better.