Expansion Microphones - Increase the audio coverage of your conference room by pairing the Expansion Microphone with your SoundStation conference phone. | Poly, formerly Plantronics & Polycom
Expansion Mics for Polycom SoundStation DUO & CX3000 – Pair – DISCONTINUED | Business Telecom Products
Polycom Expansion Mics How They Help Make Your Soundstation 2 EX Even Better!
Polycom SoundStation Premier EX Expansion Microphones