Stereo speakers with built-in amplifier. They feature compact dimensions and elegant wooden design. The speakers have a total output of 4 watts with a frequency range of 200 Hz - 18 kHz. They are powered via a USB port directly from a laptop or other device. The 3. 5mm jack enable a wide range of devices to be connected. There is a volume control on the back of one speaker. Dimensions: 84 x 84 x 129 mm. Weight: 644 g. Color: Black.