The black Revolabs FLX UC 500 USB Conference Phone is a combined microphone and speaker unit designed to provide two-way communication for collaborators and team members in meetings, conferencing, offices, and webinars. It features four built-in microphones to deliver 360° of sound pickup and a frequency response of 160 Hz to 16 kHz. The integrated tweeter and mid-woofer produce wideband audio from 160 Hz to 20 kHz and ensure audio will be heard clearly in rooms dimensioned for up to ten people. Full duplex support enables simultaneous capture and playback of audio. Echo cancellation technology minimizes ambient sound without the use of computer-based processing, providing enhanced intelligibility and clarity of your voice to clients. There are onboard buttons for volume, mute, and call start/end. For custom functionality with programs such as Skype, Microsoft Lync, Cisco Jabber, and WebEx, use the FLX UC 500 Device Manager to assign commands to the onboard buttons. The FLX UC 500 connects via USB and is powered by the supplied AC adapter.