ECOLA Mini Vacuum Cleaner Compressed Air Duster Dust Cleaner Dust Collector Tool Kit for Computer Laptop Keyboard Compressed Air Duster Dust Cleaner Dust Collector Tool Kit It can vacuum out dust and dirt from the chink of the keypad of calculator,telephone,computer,car and so on. Insert and fix in bent extractor tube and brush to top side Push switch to the ON position for operation After a period of time, the need to clean up the dust bag dust. Do not vacuum the wet things Precaution