... falante 1, Support SD card and USB disk, automatically read the first audio device you insert2, With AUX IN, it can compatible ... features:1, Support SD card and USB disk, automatically read the first audio device you insert2, With AUX IN, it can compatible ... range: 80HZ-20KHZImpedance: 4Power Voltage: USB / DC 5.0 VAccessory : Audio cable ,USB cable, lanyard , lithium battery ,manual. Warranty Card. ...