1.Excellent amplification effect,apply in kind fo teaching,tourguide,etc.

2.Power supply:Li-ion battery,recharge cycels:over 500times

3.Power:20W,2-4 times than ordinaries

4.More convenient with MP3/PC playing

5.Rugged with a safe plastics of ABS case

6.USB/TF/FM playing,LINE IN,Microphone(adjustablereverberation)

7.USB/TF/AUX/FM of switching

8.Support PREV,NEXT,potentiometer volumecontrol,play,pause,power on/off

9.Memory function when power off (memory of the music playedbefore power,the default volume of 10)

portable digital audio amplifier