GROUP EXPANSION MICSAdd-on mics for larger groupsSUPERIOR SOUND IN LARGE ROOMSExtend the range of the GROUP video conferencing system with Logitech GROUP Expansion Mics. Accommodate up to 20 people in one large room and make sure everyones voice can be heard. Simply plug the microphones into the GROUP speakerphonethey are automatically recognized and configured. An indicator light shows when the microphone is muted, when a call is active, and when Bluetooth wireless pairing has begun.DIMENSIONSExpansion MicsHeight: 83 mmWidth: 83 mmDepth: 21 mmWeight: 230 gSYSTEM REQUIREMENTSLogitech GROUPTECHNICAL SPECIFICATIONSConnection Type: Plug-and-playIndicator Lights (LED): LED to confirm video streaming, microphone mute, on-hold, and Bluetooth pairing.Microphone Type: Mono, wideband, noise cancelingButtons / Switch: Microphone mutePACKAGE CONTENTSTwo expansion microphonesPart Number: 989-000171