Enclosed solid gel dissipates through vents in gray container about 5" diameter. Place where needed to eliminate unwanted odors. Charcoal layer removes odors, does not mask odors, emit odors, or mask unwanted smells. Immediately begins to work once film is removed. Use in cars, boats, campers, storage rooms, bathrooms, pet areas, trash cans, diaper pails, etc. to eliminate organic odors including: pet, fish, urine, vomit, feces, garbage, beer, smoke from tobacco/wood, ammonia, mildew, all forms of decomposition, sewage, carbon dioxide, Freon, formaldehyde, ethylene, nitrogen, methyl alcohol, helium, and more. Lasts up to 6 weeks/60 days; 300-sq.ft. coverage approximately.