Owl Labs Expansion Mic for Meeting Owl 3 - extend audio reach in larger spaces by 8 feet (2.5 meters) in the direction of the mic.. Type: Conference microphone, Microphone sensitivity: 72 dB, Microphone direction type: Cardioid. Connectivity technology: Wired, Device interface: Micro HDMI. Product colour: Charcoal, Control type: Buttons, Mounting type: Table. Signal-to-Noise Ratio (SNR): 72 dB. Power source: Micro HDMI