Poly RealPresence Trio Expansion Microphones - microphone - 2200-65790-001 - Phone Accessories - CDW.com
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Amazon.com : Polycom Realpresence Trio 8800 External Microphones - Black (Pack of 2) : Office Products
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Polycom RealPresence Trio 8800 with Two Expansion Microphones - Replaces Polycom IP7000 : Office Products - Amazon.com
Expansion Microphones - Increase the audio coverage of your conference room by pairing the Expansion Microphone with your SoundStation conference phone. | Poly, formerly Plantronics & Polycom
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