Over-the-head style provides optimum comfort and durability The Plantronics® Encore headset delivers the very best in sound quality, comfort and reliability for call center and office professionals. Encore sets the standard in premium sound quality with the unique Sound Enhancement System (SES®). A tone control switch lets you select the level of bass and treble that you prefer for a full, rich sound. Plantronics paid equal attention to fit and all-day wearing comfort. Encore features super-soft ear cushions, and a “click-stop” adjustment system on the headband and turret that provides exactly the right fit and consistent positioning of the microphone. Durability and reliability are of critical importance, and Encore is built to last.