• 4" full range driver for satellites speaker & 4" subwooferspeaker• Bluetooth 5.0 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