... the SD/MMC card,or U disk,mini SD card,TF card directly. Portable speaker: Features: 1.Putting DC5V ... your SD/MMC card,U disk (8G supported),mini SD card(need card sets),TF card(need card ... to computer,MP3,MP4,laptops,NOkia phones,Sony Ericsson mobile phones,CD and other audio output.If the ... t use the electricity of the mobile phone,the battery builted-in can work for 3-5 hours Portable mobile speaker