M2DG Slow Release Formula is the ideal way to prevent mold, mildew and foul smells from forming. Its controlled release allows it to remain effective for up to 3 months, keeping enclosed areas odor-free. Placed where air can circulate freely around it, this unit is safe for use around people and pets, making it the year-round solution to foul smells. It is ideal for use in garages, basements, laundry rooms and more. The Small Area version treats enclosed areas smaller than 10 by 10 ; the Large Area version treats enclosed areas larger than 10 by 10 in size. - A long-term solution to foul smells in enclosed areas. - Ideal for preventing odor in stored boats, RVs, garages & vacation homes. - Remains active for up to 3 months. - Non-toxic