Polycom Expansion Kit (Mics) for Trio. Certified Refurbished Includes 90 Day Warranty . . Item # 2200-65790-001 The Polycom Trio Expansion Microphones is used to expand the video conference communication system by adding extra microphones. This microphone has a 20 feet pick up range. Trio Expansion Microphones: |Microphones |20' Pick Up Range Compatible w/ Trio: |2200-66070-001 |7200-23450-001 . .
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