... Magnetic Speakers Noppal 768 Portable Active Mini Speaker For Micro SD/TF Card, MP3, Mobilephone, PC 1) Can play the mp3 ... fomat audio files in usb disk,micro SD/TF card .2) Can be connected to to mobile phone ... : 5.0V Noppal 768 Portable Active Mini Speaker For Micro SD/TF Card,MP3,Mobilephone,PC