• Freshness in room up to 60 m2 • Neutralize odors that develop while cooking, smoking or through your pets • Needs no replacement • Works without chemicals and is therefore nonpollutin • Instructions: Before using for the first time wash the stainless steel disc with fat soluble detergeant under running water. Fill the rubber bowl with water and place the disc in it. Make sure that the stainless steel disc stays in contact with both air and water. As water evaporates, refill the bowl.