mini speaker support SD Card,U-flash, 3.5mm audio output built-in battery,7 hours mini ... the following device:A,memory card,such as SD/MMC card,U-Disk,etcB,mobile device,such as PC,mp3/mp4 player,Mobile phone,etc2,it ... ,digital cameras,headphones,etc.and our digital products covers from Mp3 player/Mp4 players,to mini speakers,etc.We are a powerful manufacturer ...