... Cheaper,high quality 3.with USB/SD, FM 4.passed CE,FC 2.1 CH fm amplifer speaker,1. Wonderful sound system2. ... with USB/SD, FM4.passed CE,FC Commodity: 2.1 CH fm amplifer speaker-SD293Output(RMS):19W+9W*2S/N RATIO: >= ... amplifer speaker with built-in USB and SD card reader, FM radio, outside antenna, remote control,2. volume, bass, ... to know more details, welcome your enqiury! 2.1 CH fm amplifer speaker