Landline Telephone Headset with Microphone Noise Cancelling, RJ9 Phone Headset Work for Polycom VVX411 Avaya 9508 Mitel 5312 ShoreTel BT Converse 2300 NEC Call Center Home Office Desk IP Phones

Landline Telephone Headset with Microphone Noise Cancelling, RJ9 Phone Headset Work for Polycom VVX411 Avaya 9508 Mitel 5312 ShoreTel BT Converse 2300 NEC Call Center Home Office Desk IP Phones

Callez RJ9 Telephone Training Adapter Y Splitter for Headset or Handset Compatible with Mitel Polycom Avaya Yealink Cisco Grandstream NEC and Other Desk Phones, Headset Phone Splitter Extension Cable