This is a special order product. Please Call us for Availability. NEC Conference MAX Expansion Unit-NEC Conference MAX expansion unit (does not work independently)-Analog wired-Distributed echo cancellation effectively eliminates echo-Noise cancellation removes background noises from fans or HVAC systems-Full-duplex sound enables participants to speak and listen at the same time without cutting in and out-Automatic level controls keep participants audio balanced and consistent-First-mic priority eliminates hollow tunnel sound by activating only the microphone closest to the person speaking-3 Microphones provide360 deg. audio pickup-Requires NEC-750073-Up to 3 NEC-750156 can be added to NEC-750073-Gray Package Contents:-1 Max phone pod-12 ft. Cat5 cable-Telephone cable-Documentation CD-Manual
