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 1 surround sound gives you

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

ideal for most of cars EXCEPT trucks

widely used in 3 -6

clutch service

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 1 surround sound gives youCallez 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.