The AVer VC520 PRO/VC520 PRO2/VC540 Expansion Microphone is designed to expand the VC520 PRO Video Conferencing System's microphone pickup range. This full-duplex microphone is equipped with a mic that picks up voice within 360° at up to 15', giving you configuration flexibility regardless of your room design or seating arrangements in meeting rooms and classrooms. 

To avoid crowding around one speakerphone, you can daisy-chain the Expansion Microphone to the speakerphone that's included with the VC520 PRO video conferencing system and achieve a 30' voice-pickup radius. For larger spaces, you can daisy chain up to four Expansion Microphones (available separately). 

What's in the box: 

AVer VC520 PRO/VC520 PRO2/VC540 Expansion Microphone Cat 6 Microphone Cable (5m)