1.portable amplifier speaker with TF card slot 2.red LED screen 3 ... AUX and USB driver 1.portable amplifier speaker with TF card slot2.red LED screen 3 rechargeable lithium battery4. ... such as MP3, PC and mobile. With micrphone and amplifier. Features1. With LED screen, can display FM frequency and ... playing time. 2. With microphone and headset, work as a megaphone.3. With SD card slot, USB driver, ...