Product Sheet
Page 1
... control Listen volume control Mute switch Headset on the phone. Plantronics, the logo design, Quick Disconnect, S11, and Sound Innovation are the property of Plantronics, Inc. The S11 includes an over-the-head headset for superior sound clarity. The telephone amplifier is compatible with a noisecanceling microphone for stability with most phones and provides mute and volume control.
... control Listen volume control Mute switch Headset on the phone. Plantronics, the logo design, Quick Disconnect, S11, and Sound Innovation are the property of Plantronics, Inc. The S11 includes an over-the-head headset for superior sound clarity. The telephone amplifier is compatible with a noisecanceling microphone for stability with most phones and provides mute and volume control.