Use the brush & suction tube attachment for general cleaning of air vents (Fan), Moniter and computer areas, or dust on your desktop. Requireds NO external power source, plugs straight into any USB port. Color: Black High power button should NOT be pressed while the U-VAC motor is being switched on to keep voltage jump within USB limits(500 mA) during motor start up. Back to Top Accessories: One USB powered vacuum cleaner; a tube; a brush. Plug and clean, so convenient