Starbrite M2DG Small Area Slow Release: 2-10 Gram Packs 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, boats, 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. Starbrite NosGuard SG Mold / Mildew Odor Control Slow Release System Features 2-10 Gram Packs A long-term solution to foul smells in enclosed areas. Treats area smaller than 10' by 10'. Ideal for preventing odor in stored boats, RVs, garages, and vacation homes. Remains active for up to 3 months. Non-toxic formula; safe for use around people and pets.