NLC Mini USB Vacuum Keyboard Cleaner Dust Collector For Laptop Notebook PC Simple connect the vacuum to other USB port of your laptop computer Two vacuum cleaning attachments included-one bristle brush attachment and one flexible rubber, computer keyboard tool attachment Two switch levels-slide the switch to the first levels 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