Plantronics Entera USB Series is a simple-to-use, comfortable, and durable choice for PC-based, phone-intensive users in busy customer service environments, conference calls, Web-based training, and PC multimedia applications. It connects to PCs via integrated USB and is compatible with Windows or Mac OS. The wideband audio delivers richer, clearer conversations while SoundGuard technology protects from noise spikes and listening fatigue. Adjustable headband and soft ear cushions ensure all-day comfort, and the swiveling QuickAdjust boom facilitates correct microphone placement for optimal noise-canceling performance. Easy in-line controls for volume, mute, and call answer/end enable representatives to bypass on-screen menus and control call functions at their fingertips.