Expansion Microphone for Poly Studio & RP Debut – Global Communication
Amazon.com : Polycom Expansion Mics for SoundStation IP 6000 (2215-07155-001) : Audio Conferencing Equipment : Office Products
Expansion Microphones - Increase the audio coverage of your conference room by pairing the Expansion Microphone with your SoundStation conference phone. | Poly, formerly Plantronics & Polycom