1. This model can use USB and SD card, it has specialty volume control.
2. 6 channels microphone input and it can be conneted to band music signal input.
3. Reverberant unit is imported with original packaging. it has excellent timbre  modulation,
   And the dual relay protective circuit can protect the speaker perfectly
4. It uses 28 pieces of big power audio tube with Toshiba for current amplification,twelve
  pieces of imported  large bulk capacitance and annular transfomer for power supply.
5. With double 9 band equalizer and it can be a mixer console for you to adjust each band
  of frequency easily.

Specifications:
   Output power：720W+720W
   Frequency Response： 30Hz－20KHz±3dB
   Signal to Noise Ratio： ≤76dB 
   Separation： ≥35dB 
   T.H.D： ≤0.2%
   Power Requirements： ~220V/50Hz
   Net Weight: 21Kg
   Size(mm)： 490(L)x200(H)x415(W)