Using the USB charger or access charge adapter. 
High. capacity lithium battery extended playing time. 
U disk direct decode/TF card on the mp3 music format. 
Support a variety of audio (mp3, mp4, Walkman, computer, cell phone, etc)  
Speaker unit: 8 inch
Total continuous power: 50w
Frequency response: 80Hz - 18 KHz
Signal noise ratio:  >85dB