The Sirchie Electrofuming Iodine Fumer Kit has a dual purpose. It saves your breath when fuming with iodine and provides a quick, efficient means of developing latent prints on porous surfaces such as paper, cardboard, raw wood, etc. The FUM250 features a high-volume, battery-operated air pump. This handheld unit weighs a mere 14.1 oz. (400 g) with batteries and is supplied with both Fumette Disposable Iodine Fuming Guns and Iodine Print Enhancers. All conveniently contained in a rugged ABS carrying case.