Use Power Duster to remove all dust, dirt, and microscopic debris from hard-to-reach areas. Remove residue from areas once thought impossible to clean. Power Duster is specifically formulated to keep equipment clean, prolonging performance and longevity. By using the convenient trigger and extension tube, precision cleaning is safe and easy. The ozone-safe electric duster leaves no residue, and its lifespan is indefinite. Ideal for use on computers, keyboards, laboratory equipment, printers, fax machines, copiers, scanners, telephone and audio equipment, clocks and watches, televisions, VCRs, CDs, DVDs, small motors, engine parts, power tools, and much more. Power Duster II contains 134A propellant, which is recommended for use on energized equipment. Duster contains bittering to discourage inhalant abuse.