The Polycom 2200-15855-001 adds 2 extension microphones and a7 foot connection cable for them to your existing Soundstation Duo or CX3000 Conference Phone. This extension microphone kit includes 2 microphone pods and 7 ft connection cables.
Extension Microphone Kit for CX3000 IP Conference Phone (2201-15855-001)'
Polycom 2200-15855-001 Microphone Kit
2 x Extension Mics