... /TF/USB/MMC Cards MP3 Player/Speaker HOT 1)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, ... The power input: DC 5 V Product features advantages:1. The stereo sound quality, super heavy bass, excellentworkmanship. ... 8 W RMS x 2 (THD + N = 10%, f = 1 kHz)Bass channels: 14 W RMS (THD + N = 10 ...