Detail：
  　　
Microphone to speak with key and light, you can control / indicating the machine status
Single-directional, anti-gas explosion sound features, with a wind shield
Chairman of priority control buttons to activate the system beep to remind the attendance note can be set permanently terminate terminate or suspend the microphone to speak to speak on behalf of all state
Chairman of the system an unlimited number of units, and can be placed anywhere in the loop
System Chairman Unit restrictions unrestricted function
Bypass capacitor microphone boom, and has spoken instructions aura
High sensitivity microphone
By the system unit power supply, input voltage range of 18V to be safe
Unit 8-core line "T" connector
ET-XXXXSc / ET-XXXXSd with automatic video tracking
Unit with a microphone cable
Compliance with international conference equipment electrical certification standards (IEC 60914) and international safety standard UL or CE certification

Frequency Response: 50-16kHz
Sensitivity: -42dB ± 2dB
Reference speaking distance: 15cm-60cm
Microphone tube length: 390mm
Dimensions: 217mmx120mmx64mm
Weight: 1kg
LCD, simple, complex, English three languages ??optional