Frequency range:  A52180Hz~21kHz, -6dB 

Inside Build-in: 
Usb Hub 
Sound Card 
Class A Amplifier
 
Drive units: 
1 x 40mm ( 1.57 in) bass 
2 x 28mm ( 1.1 in) metal dome tweeter Power 

Input voltage: 5-pin USB Cable ( 5V/500 mA ) 

Amplifier output: power 2.2 W  
Inputs 3 x USB 2.0 connector 

Dimensions： 
Min  278 x 54 x 35 mm  
Max  340 x 54 x 35 mm 

Cover：Changeable color cover