... Speaker,Mini Digital FM Radio Speaker For MP3,Micro SD/TF Card,Mobilephone,PC 1) Can play the mp3 fomat audio files in usb disk, micro SD ... /TF card .2 ... :≥80dBOutput: 3.7V*4.2VInput: 5.0V Portable Music Cube Speaker,Mini Digital FM Radio Speaker For MP3,Micro SD/TF Card,Mobilephone,PC