▶ FD-102 is a high-speed feedback suppressor that can receive 10
   channels of microphone input and 2 channels of balanced output.

▶ Each microphone comes with an independent 48V phantom power
   supply and gain adjustment. 

▶ Two lotus line inputs and outputs and two music inputs.  The panel is
   equipped with a display screen, which can display the current working
   status and signal level size, and switch between panel direct and
   feedback with one key. 

▶ Automatic mixer is built into the 10-way microphone input. 
▶ In many situations, such as in a pulpit or conference table, the use of
   two microphones can better capture the sound of a moving speaker,
   which often increases the risk of acoustic feedback. 
▶ In view of this problem, an automatic mixer will automatically reduce
   the gain of the microphone with the weak signal input and increase
   the gain of the other microphone with the strong signal input. 

▶ This way, it can track moving speakers and produce optimal sound
   clarity.