... USB and SD card interface 3)Support SD/TF card,USB Portable SD/TF/USB/MMC Cards MP3 Player/Speaker HOT1)ROHS,CE,FCC 2)With USB and SD card interface 3)Support SD/TF card,USB ... Product technical parameters:1. Application: notebook computers, mobile phones, MP3, MP4, DVD, CD ... 28. SNR: acuity 58 db9. The power input: DC 5 V Product features advantages:1. ...