Spreed USB Conference Speaker Microphone Conference speakerphone with microphone and loudspeaker, compact design and easy setup Plug-and-play, USB compatible audio device Excellent audio quality thanks to the 16-bit audio processor, built-in echo cancellation and noise reduction Spreed one-ear headset included, microphone and loudspeaker plugs to connect any headset Compatible with Windows, Mac and Linux, no sound card or software required