Telephone Training Adapter Y Splitter + Mute Button for Headsets compatible with Polycom, Nortel Meridican, Norstar, Avaya, Ashtra, Mitel, Ge and Other IP Phones.
Can plug either into handset port or headset port
Mute button control with red indicator when on to avoid accidental talk into conversation
Handset or Headset Splitter
Great use for call center / telephone marketing trainings