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Product name:Engineering series
 
Constant pressure plate Speaker: Built-in our own research and development of ultra-thin regulator, size and appearance of the model with the same home theater, power of 10W, the other technical parameters and set the same resistance.
Constant pressure amplifier series: a variety of styles, rated output power 90W/120w/180w ~ 500w, etc., 3 mic and 2 audio inputs, 1 output, two channels with separate volume control, high and low tone controls, MICI with magic sound features, easy to insert the emergency broadcast, input short circuit, overheating and overload protection.