Power: Actual output of 18W (9W x 2). Specifications: 6.5-inch 60Hz subwoofer with RGB lighting. Battery: 3.7V/3600mAh lithium battery. Features: Dual USB/TF card decoding, AUX input, FM radio, microphone, Bluetooth/TWS connectivity, voice prompt function, large rotary knob, four 8-inch displays, and included USB charging cable.