Training Y-Connector connects two headset tops to a single headset adapter for training purposes. Quick disconnect feature allows fast, simple connection and removal. Mute switch works on either headset to prevent listeners from hearing audio from more than one microphone. 7' cable extends your reach to allow both users to sit comfortably. Adapter is compatible with Plantronics QD amplifiers, Polaris and H Tops headsets, DA series adapters for USB ports, and Avaya/Lucent HIC and HIP cables.