ULTRA Duster will safely blast away any dust: dirt: and unwanted micro-articles from computers: keyboards: printers: and other electronics equipments: without leaving any residue. It effectively cleans by reaching those hard to clean areas and therefore helps maintain premium levels for electronic devices. ULTRA Duster is earth-friendly and containers no CFCs (Freon). ULTRA Duster contains a bitterant additive that discourages potential abusive and misusage of the product by making its contents unpleasant to inhale.