... Jack High-Fidelity Magnetic Speakers Portable Music Cube Speaker,Mini Digital FM Radio Speaker For MP3,Micro SD/TF Card,Mobilephone,PC 1 ... with an audio source output device3) FM radio 4) High fidelity voice unit5) Take four 8 digital tube6) Can show the playing time ... .7V*4.2VInput: 5.0V Portable Music Cube Speaker,Mini Digital FM Radio Speaker For MP3,Micro SD/TF Card,Mobilephone,PC