Off! Mosquito Coil Starter, Packaged In A Metal Modern, Decor Tin To Protect From Weather, Each Starter Comes With 3 Coils & 3 Trays, Repels Mosquitoes, For Use On Patio & Decks, Country Fresh Scent, Lasts Up To 4 Hours, Protects Up To 10' x 10', For Outdoor Use Only, For Refill Use #75203.