... computer, mobile phone. 2. support USB, SD card 3. with button to control Mini Speaker with USB Input: Product ParameterDecoderXZG2008Remote Control ... holePower inUSB,DC power supply.FormatMP3,layer1-3Stereo AudioBASS , CLASSIC, ROCK, JAZSSButtonPLAY, VOL+,VOL-, NEXT, PREV. EQ.IndicatorLED light. Play: blue ...