Logitech GROUP Expansion Microphone. Type: Presentation microphone, Microphone sensitivity: 28 dB, Microphone frequency: 100 - 11000 Hz. Connectivity technology: Wired, Maximum operating distance: 8.5 m. Product colour: Black. Microphone weight: 230 g, Microphone dimensions (D x H): 21 x 83 mm...

Omni-directional microphones supporting 20-foot diameter range...