Host Unit description:  Discuss digital conferencing systems; · Products using digital radio processing audio signals and control signals, without the cumbersome wires;· Scientific IP and ID code design, ID: 001-008, IP: 001-160;· Unlimited number of units can be placed anywhere in the loop;· CPU multi-stage error correction and encryption scrambling. Prevent cross-channel interference and anti-cell phone electromagnetic interference;· FIFO and having restrictions on speech, the President dedicated three kinds of speech patterns, while the number of speakers 1-4 persons Optional;A host large screen (240X128) dot matrix LCD display work content. Hierarchical menu design, with volume control, speech patterns, the number of speakers, using the channel, EQ functions, communication and IP communication ID adjustment function, real-time display the number of speakers, the order of the channel, the channel position and power unit data;· Chairman priority control function, limited by limiting function, can cut the representative;Use distance: 100-120 meters, communication distance: 120-200 meters;· 2U chassis design, can be installed in 19 inches   Power (Power supply): DC12-17VReceiving sensitivity (Sensitivity): -105dBmSignal to noise ratio (S / N Ratio):> 90dBDistortion (T.H.D): <0.05% dB @ 1KHzEffective working distance (Working sistance): ≥100 metersSession number of channels (Frequency channels): 4 * 64Power (Power): 6.5W  Chairman and Delegate  Unit description: Discuss digital conference system unit; * Anti-electromagnetic, mobile phone interference function;· LED Tip speech patterns, working conditions, low pressure indication and control buttons, etc. Chairman of the content information;· Chairman unit has the priority function, limited by limiting function, can cut the representative;· Gooseneck microphone pole design, the microphone has a light ring indicates power-on state;· External transmitting antenna, the signal all directions, which do not appear out of control within the effective range;• Use 4 * AA 1.5V batteries, namely that the use of the installation, can be used continuously for 7 hours.Optional color: black.  Power supply (Power supply): DC 6V, AA1.5V * 4Transmit power (Transmit power): 10mWPickup microphone (Microphone core): capacitive, single pointMicrophone sensitivity (Sensitivity): - 43 ± 3dB @ 1KHzFrequency response (Frequency response): 20-18KHzLasted longer (Working time) when using: Chairman and Delegate 8 hours