SoundStation Premier EX (expandable) (Polycom/Avaya Analog Co-branded).
The SoundStation Premier has unequaled voice quality. World's best full-duplex system eliminates echoes, clipped words and reverberation for more natural, two-way conversations. Crisp, clear voices so you won't miss a word. Intelligent processor filters out background noise even when speaker is moving around the room. Easy to use keypad operates just like a hand-set phone, including mute button and flash key. Full digital display. Total control at your fingertips, optional infrared remote puts all functions in your hand. High fidelity sound, state of the art speaker has enough power to fill large rooms with clear, rich sound. 360 degree room coverage. Classic gray color.