1.portable amplifier speaker with TF card slot 2.red LED ... battery 4.FM, AUX and USB driver 1.portable amplifier speaker with TF card slot2.red LED screen 3 rechargeable ... and USB driver SV-929 usb SD card mini speaker amplifier offers a premier listening experience; It has digital FM ... , such as MP3, PC and mobile. With micrphone and amplifier. Features1. With LED screen, can display FM frequency and ...