4" full range driver for satellites and 6.5" bass driver for subwoofer, Plug & play USB reader, Bluetooth 4.0 version, USB reader supporting MP3/WMA dual formats decoding, Uninterrupted digital FM working on PLL technology, FM storage up to 100 stations, Super big wooden cabinet subwoofer and satellites delivers heart-thumping bass, High efficient energy saving design, Fluorescence full function remote control, Play your desired song & FM station directly by numeric keys through remote.