With sensitive, high-performance speakers, SoundStation Premier EX delivers crisp, clear sound that's twice as loud as Polycom's SoundStation. It's also twice as quiet. The SoundStation Premier EX's automatic microphone switching technology means that only the microphone nearest the person talking is on, limiting extraneous noise from around the room. And, SoundStation Premier EX allows you to add two additional microphones for greater room coverage.??Like all Polycom voice conferencing solutions, the SoundStation Premier EX is designed with Polycom's breakthrough Acoustic Clarity technology, which allows natural, two-way conversations.??Add the Satellite option to the SoundStation Premier and you have the ability to expand your system to a total of two speakers and eight hypercardioid microphones, including an optional 900MHz wireless microphone to give you even more freedom and convenience during your conference call.