Features: • 4'' full range driver for satellites speaker & 4'' subwooferspeaker • Bluetooth 4. 0 version • Product qualified by SIG certification • Bluetooth operation range up to 15 meters • Plug & play USB card reader • USB reader supporting MP3/WMA dual formats decoding • Uninterrupted digital FM working on PLL technology • FM storage up to 100 stations • Full, clear sound with powerful bass • Fluorescence full function remote control