Product information: 
 Interface type: USB 
 Battery capacity: 2000mah 
 Frequency response range: 40Hz-20KHz 
 Output power: 14W 
 Signal to noise ratio: ≥75dB 
 Power supply: built-in lithium battery 
 Playing time: 8 hours 
 Number of speakers: 2 
 Effective distance: 15 meters 
 Box material: plastic
 
 Size Information: 
 Appearance size: 195*73(diameter)mm
   
  Packing list: 
 Color box, manual, data cable, audio cable