1) Suitable for PCs or mobile PCs 2) Two vacuum cleaning attachments included: one bristle brush attachment and one flexible rubber keyboard tool attachment 3) Two switch levels slide 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 4) Press the "high power" button to increase suction power, for vacuuming heavier dirt and dust 5) Uses keyboard attachment rubber to vacuum the dust and other particles trapped underneath keyboard keys, by sliding squeezable tube between keys 6) Uses brush and suction tube attachment for general cleaning of air vents (fans), monitors and computer areas, or dust on your desktops 7) Requires no external power source, plugs straight into any USB port.