mini speaker support SD Card,U-flash, 3.5mm audio output built-in battery,7 hours mini size:300* ... device:A,memory card,such as SD/MMC card,U-Disk,etcB,mobile device,such as PC, ... number:SG-589 mini portable multimedia speakerinterface:USB,SD card,3.5mm stereo jacksupport resource:U-disk,MMC/DC ... products covers from Mp3 player/Mp4 players,to mini speakers,etc.We are a powerful manufacturer with ...