1,Mini portable speakers for mp3 mobile laptop,support SD card 2,Apply to mobile phone, computer, MP3/MP4,digital devices Overview : Complaint to FCC, CE, RoHSMini size, cute, compact and portable.Easy to carry and convenient to use. U-12 Tech Specs:1,Support SD / MMC card and U disk reads, support for MP3 format music files2,Can be connected to mobile phones, computers, MP3 players, home audio ...