... .5inch the functions and the advantages of our mini speaker1,it can play music automatic by the ... ,memory card,such as SD/MMC card,U-Disk,etcB,mobile device,such as PC,mp3/mp4 ... number:SG-589 mini portable multimedia speakerinterface:USB,SD card,3.5mm stereo jacksupport resource:U-disk,MMC/DC card ... products covers from Mp3 player/Mp4 players,to mini speakers,etc.We are a powerful manufacturer with ...