... support of the following device:A,memory card,such as SD/MMC card,U-Disk,etcB,mobile device,such as ... battery can be 7 hours.4,good bass stereo effect for your comfortable enjoyment.5,low price:we have ... :SG-589 mini portable multimedia speakerinterface:USB,SD card,3.5mm stereo jacksupport resource:U-disk,MMC/DC ... card,PC,MP3/MP4Power supply:DC 5v/Li battery, ...