1) output power: 3w*1 2) frequency response: 120 hz-18khz 3) horn size: 3inch/4î© 4) built-in battery: lithium battery 3.7v/800mah 5) input power: 5.0v 6) with bluetooth function Speaker function: support 3.5mm audio, pc audio input, sd and usb card, fm radio Accessories: usb charging cable, 3.5mm audio cable, remote control Size: 112*85*147mm Meas:495*495*360mm(box/40units)