External computer speaker in Black (set of 2) for amplifying PC or laptop audio USB-Powered from USB port of PC or Laptop In-line volume control for easy access Blue LED lights; metal finish and scratch-free padded base Bottom radiator for “springy” bass sound Frequency range of 80 Hz - 20 KHz; 2.4 watts of total RMS power (1.2 watts per speaker) Product Dimensions: 3.9 x 2.6 x 2.8 inches (LxWxH)