2.1 CH fm amplifer speaker, 1. Wonderful sound system 2.Cheaper,high quality 3.with USB/SD, FM 4.passed CE,FC 2.1 CH fm amplifer speaker,1. Wonderful sound system2.Cheaper,high quality3.with USB/SD, FM4.passed CE,FC Commodity: 2.1 CH fm amplifer speaker-SD293Output(RMS):19W+9W*2S/N RATIO: >=80 dBFrequency response:50Hz-150Hz, 120Hz-18KHzDistortion@ REF:<=1%Speaker Unit:Satellite:3"*2Subwoofer:5" ...