USB Mini PC vacuum for computer keyboard hoover laptop Simply connect the Vacuum to the USB port of your latop or Computer. Two Vacuum cleaning attachments included-one bristle brush attachment and one flexible rubber, computer keyboard tool attachment. Two switch levels-slides the switch to the first level to turn on the LED light, slide the switch to the second level to turn on the vacuum cleaner. Press the "High Power" button to increase suction power, for vacuuming heavier dirt and dust. Use the keyboard attachment rubber to vacuum the dust and other particles trapped underneath the keyboard keys, by sliding the squeezable tube between keys.