Plantronics S11 is a hands-free telephone headset system designed to enhance productivity and comfort during phone conversations. With its noise-canceling microphone, you can experience superior sound clarity while filtering out background distractions. The over-the-head style headset ensures all-day comfort and can be worn on either ear for your convenience. Easily accessible controls on the base allow for quick adjustments to volume, tone, and muting. The S11 is compatible with virtually any single- or multi-line phone, making it a versatile solution for various office setups.