Features:
   The number of chairman unit is unrestricted, so it can be  added in    
     any position of the system.
     Equipped with an earphone output jack and wireless MIC  input jack.
     Interpretation listening, 6+1 channel. 
     Chairman MIC has  the priority button to mute delegate MIC. 
     Contains electing and voting functions. 
     Indicative sound for chairman unit (optional)
SPECIFICATION
     Powered by main unit 
     Adjustable gooseneck 
     Ring LED indicator 
     On/off button 
     Press-to-talk priority speech button 
     Chime to mute the delegates. 
     Built  in 1W speaker 
     Reference distance: 20-120cm 
     Frequency response: 100-13000Hz 
     Sensitivity: -44dB