Will safely blast away any dust, dirt and unwanted micro-articles from computers, keyboards, printers and other electronics equipment, Will not leave any residue. It effectively cleans by reaching those hard-to-clean areas and therefore helps maintain premium levels for electronic devices. Ultra Duster contains no CFCs (Freon). A bitterant additive discourages potential abusive and misusage of the product by making its contents unpleasant to inhale.