Portable SD/TF/USB/MMC Cards MP3 Player/Speaker HOT 1)ROHS,CE,FCC 2) ... TF card,USB Portable SD/TF/USB/MMC Cards MP3 Player/Speaker HOT1)ROHS,CE,FCC 2)With USB ... Product technical parameters:1. Application: notebook computers, mobile phones, MP3, MP4, DVD, CD, U plate and the audio ... stereo sound quality, super heavy bass, excellentworkmanship.2. Support MP3 format music files.3. Support SD card, U disk ...