Plantronics Y training cord with mute switch (part #27019-03) for use with Plantronics H-Series Headsets; allows two headsets to function off one amplifier (M22). Also known as the supervisor's adapter cord. Comes with in-line mute switch. Quick Disconnect attaches to two Plantronics Headsets (H-series, P-Series or Plantronics Cisco Headsets). Both headsets can listen, but only one headset have a live microphone. The other microphone is muted.
Important Note: NOT compatible with wireless headsets
Note: The red toggle switch allows the supervisor to control which microphone is live and which is muted. So only one microphone is live at any given time.