... USB support Digital Speaker 1)ROHS,CE,FCC 2)With USB and SD card interface 3)Support SD/TF card,USB TF/SD USB support Digital ... Speaker1)ROHS,CE,FCC 2)With USB and SD card ... interface 3)Support SD/TF card,USB ... interface: 3.5 mm stereo headphones plug, USB interface(card reader)Adjust the volume, form: ...