Polycom RealPresence Trio 8800 With Expansion Mics - 323.tv
Expansion Microphone Kit for Poly Trio 8300/8500/8800 (qty 2) – Global Communication
Expansion Microphones - Increase the audio coverage of your conference room by pairing the Expansion Microphone with your SoundStation conference phone. | Poly, formerly Plantronics & Polycom