The Logitech GROUP Expansion Mics are designed to extend the audio reach of your existing Logitech GROUP video conferencing system, ensuring everyone in the room is heard clearly. This set includes two black omnidirectional microphones that expand the voice pickup diameter to 8.5 meters, making them a practical addition for larger meeting spaces where the central speakerphone alone might not capture every participant. Each unit measures 83 x 83 x 21 mm and weighs 230 g, featuring a discreet design that blends into a professional tabletop. For ease of use during calls, you can quickly silence your audio using the integrated mute button, while the LED status indicator provides a clear visual cue of whether the microphone is active. These wired peripherals operate within a frequency response of 100 to 11,000 Hz with a sensitivity of 28 dB, providing the consistent audio quality needed for productive business discussions.