The Spreed Conference Speaker Microphone is a portable conference speaker for office use at your desk and in small meeting rooms. Echo cancellation and noise reduction is integrated. No need to install any software. The Spreed Conference Speaker is the perfect choice for Skype and Spreed Online Meeting and VoIP telephony. The Spreed conference speaker comes with an one-ear headset. Separated plugs for microphone and loudspeaker allows you to connect an external microphone or headset. Just plug-in the Spreed headset to reduce the ambient noise level or to have a private conversation. Two volume control buttons (+/-) at the front allows easy volume control. Use the mute button to mute the microphone. The mute status and activity is indicated by a LED - green: microphone is active, red: microphone is muted, blinking: speakerphone active. The Spreed Conference Speaker Microphone is a standard USB audio device compatible with PCs (Windows 7/Vista/XP/2000 and Linux) and Mac OS X. Software installation is not required, just plug-in and use. This product includes: USB conference speaker USB cable One-ear Spreed headset Manual (English) Compatibility: the Spreed conference speaker is fully compatible with Windows, OS X and Linux. In case of audio problems, connect the conference speaker directly to your computer/laptop, not through an USB hub (when running Windows XP, connecting through an USB hub might not work properly).