USB teaching sound box wireless megaphone with headset microphone HY-2078U

Product name:
USB teaching sound box wireless megaphone with headset microphone  HY-2078U

Product model:HY-2078U

Built in feature:
With echo and tone
With USB play MP3;
Use for: teaching,outdoor activities,shopping mall,auction,the streets,squares, speech, exhibitions,seminars,ect. 

Specifications:
Power supply:AC 200V,DC 12V(Built-in rechargeable storage battery);
Inputs: 1 wired microphone inputs & 1 AUX input;
Music power: 50 watts Max;
Transmitter power: 30 mW (maximum);
Speaker: one 4 Ohm full range 6" speaker;
T.H.D.: less than 5%;
Frequency channel: Single channels;
Wireless service range: 35M Max in VHF;
Operating temperature: -25 to 45 degree;
Frequency range: VHF 175-260 MHz;
Dimensions W*D*H: 180*110*300mm;
Gross weight: 2.02kgs.

Accessories:
Body-pack transmmitter * 1,lavalier microphone * 1,headset microphone * 1,9V battery * 1,power line * 1.