Polycom SoundStation IP 7000 SIP Extension Microphones, Connect these 2 extension microphones and expand the amazingly clear HD Voice sound quality of your Polycom SoundStation IP 7000 SIP Conference Phone (Item# 12258) to more areas of the room during conference calls! Transform your SoundStation IP 7000 from a small to medium-sized room conferencer into a large room conferencer simply by adding these handy extension mics. Position the corded microphone pods as needed up to 7 feet on either side of the base unit for the best possible voice pickup during audio conferences for all participants to sound crisp and clear. Boost your rangeand the value of your conferencerwith these expansion mics 2 extension microphones — bring the numerous acoustic features of your Polycom SoundStation IP 7000 SIP Conference Phone to more parts of the room. Increased audio range — provides conference room coverage beyond the 20-foot range of the conferencer alone.