Callez RJ9 4P4C Telephone Training Adapter Y Splitter for Headset or Handset Compatible with Plantronics Mitel Polycom Avaya Yealink Cisco Aastra Shoretel Nortel NEC Grandstream and Other Desk Phones Black sold2020 D-Port design to stop connectors

D-Port design to stop connectors rotating (connectors NOT included)

Rated for 15 amp service and has a blade type fuse holder

Test the fitment first

1 surround sound gives you enough footsteps and other bass audio cues

4in Width: 5

Callez RJ9 4P4C Telephone Training Adapter Y Splitter for Headset or Handset Compatible with Plantronics Mitel Polycom Avaya Yealink Cisco Aastra Shoretel Nortel NEC Grandstream and Other Desk Phones Black sold2020 D-Port design to stop connectorsCallez RJ9 4P4C Telephone Training Adapter Y Splitter for Headset or Handset Compatible with Plantronics Mitel Polycom Avaya Yealink Cisco Aastra Shoretel Nortel NEC Grandstream and Other Desk Phones Product Features Compatibility Notices: The compatibility of this telephone training adapter depends on whether your RJ9 headset is compatible with your telephone. As long as your headset is compatible with your telephone, the adapter will work properly.