Power: Actual output of 18W (9W x 2). Configuration: 4-inch/55mm magnetic woofer with RGB lighting. Battery: 3.7V/3600mAh lithium battery. Features: Dual decoding for USB/TF cards, AUX input, FM radio, microphone, Bluetooth/TWS connectivity, voice prompt function, one large rotary knob, four 8-inch displays, and included USB charging cable.