Polycom's digital microphone array is the audio pickup device for video conferencing systems on the market that offers consistent, reliable, 360-degree voice pickup in 22 kHz StereoSurround audio! When paired with a Polycom HDX video conferencing system, the audio pickup and delivery is unmatched.The ceiling microphone array is designed to eliminate acoustic noise coming from the ceiling, while boosting sensitivity gain even when the speaker is directly beneath the microphone. To achieve up to 2,800 square feet of coverage, simply connect up to two ceiling microphone arrays to a single HDX video system. Adjustable drop height from ceiling will accommodate any room size or environment. This huge coverage area is up to three times larger than competitive unidirectional ceiling microphones. It is delivered as a complete kit with all mounting hardware required for easy installation. Polycom ceiling microphone array seamlessly integrates with the Polycom HDX video systems and Polycom SoundStructure so you'll always enjoy the best audio quality in echo cancellation, noise reduction, and automatic gain control.