FEATURES:Bluetunes Supported (Audionic's State of the art Bluetooth connectivity)USB supportedSD Card SupportedLED displayBuilt-in FM RadioRemote ControlAC/DC Power SupportedOutput Power: 20W + 10Wx2 (RMS)Sub-Woofer: 5InchesSatellites: 3Inches x 2Frequency Response: 20Hz ~ 20KHz..