We have a Polycom SoundStation2 which provides impeccable voice call conversations in a conference room. The unit includes a large backlit display that offers easily visible call information and telephone functions; and smart technology, such as Dynamic Noise Reduction (DNR), maximum microphone sensitivity, while reducing distracting room and background noise. SoundStation2 offers 360-degree microphone coverage with intelligent mixing -- so only the microphone closest to the speaker is on for crystal clear conferencing. Add traditional telephone features like redial, mute, transfer, and hold and you have a conference phone that's also familiar and easy to use.