1.Two kinds of power supply can be changed: AC alternating current and internal
  storage battery.
2.Internal storage battery, it is easy for using and changing. The storage battery in
  this produce that can use 6~10 hours. Charging time of the new storage battery
  must be more than 24 hours at the first time.
3. The storage battery have protective circuitry, when the voltage of storage battery
  is less than 9v, the protective circuitry will cut the power off, protect the storage battery.
4.SMD hardware, SWT technology, good quality.
5.Quartzose concussive circuitry, frequency is steady-going and  strong anti-jamming.
6. 98 sets VHF215-265m frequency, it never interfere each other, you have extensive
  selectivity. Dual frequency receiver and dual wireless microphone.
7.Digital reverberation, woof and alt.
8.It has DVD player with USB and SD CARD port , AM/FM radio, 12 radio channels can
  be saved, LCD full screen display.
9. Internal antenna, avoid breaking off.
10. Wireless microphone and wireless emitter can use 9V battery or 8.4V storage battery. 
11.Good looks and wear well. Portable with wheel , it is moved expediently

Specifications:
Power：                   AC110V/220V/230V/240V 50Hz
                          DC±12Vinsert12V/10AHzstorage battery×2
Speaker：                 12 inch woofer / clarion tweeter
Channel：                 Dual channel wireless microphone
Range of frequency: VHF215-265MHz（98sets of frequency)
Sensitivity：              10dB     V(S/Nor up to60dB)
Size:                      (L*W*H)48X48/74c630mm
Weight:                    33.5Kg
Power output:              200W
Max distortion:             ≤2%