Product description<br /> Material: plastic<br /> Size: 7.2*7.0*7.0cm<br /> Color: black and red<br /> Rated frequency: 3 (HZ)<br /> Rated power: 3 (W)<br /> Rated voltage: 5 (V)<br /> Expansion interface: USB interface<br /> Package content: 1 pair of notebook mini portable speakers<br /> 1.Small Size, Big SoundTwo speakers, with dimensions at less than 3 inches per side, to output full, rich audio from your PC/laptop/notebook.<br /> 2.USB Power Both speakers draw all their power through the USB connection in the cable so you don't have to worry about finding an outlet or carrying around an adapter.<br /> 3.3.5 mm Audio Plug Near-universal audio plug quickly connects to most PCs and mobile devices.<br /> 4.Volume ControlMore convenience with an in-line controller that lets you quickly adjust the volume of the speakers without having to change the volume on your device.<br /> 5.Built to TravelCompact form and durable construction mean you can have sound most any place you go; a great fit in your laptop bag, briefcase or bookbag.<br />