The "DusteR" canned air has an air stream filtered to 0.2 microns to clean critical components and areas of trace instruments where contamination from dust and dirt can effect devices’ proper functioning.
Hold can in an upright position—never inverted, tilted, or shaken—and apply in short bursts. While spraying, hold can several inches from the target area to avoid damage to fragile components. This is the OEM recommended product, not the flammable and less-pure canned air product available from office supply stores.