The Nattaro Scout Lure is placed inside the Nattaro Scout Bed Bug Monitor (sold separately). The Lure contains a unique blend of bed bug aggregation pheromones which draw both sexes as well as nymphs and adults to the trap. Once inside, the bed bugs cannot climb out. The Nattaro System is designed to be used for early detection of a bed bug infestation and to verify a successful result following a bed bug treatment. The Lure should be replaced every 21 days. Store lure packs in a cool, dry environment or in a fridge.