ClearOne Beamforming Microphone Array 2 is a Ultra-sleek design to deliver the clearest audio pickup available with beamforming, acoustic echo cancellation and smart switching. Most advanced AEC and Noise Cancellation. Single cable for power, audio, and control. Can daisy-chain with Dialog 20 Wireless Microphone System. Acoustic Intelligence with adaptive ambient. Two power options- P-Link and POE. Can daisy-chain with all ClearOne P-link devices such USB expander and GPIO expander.