Contains 4 ant bait stations - Ants are attracted to the bait in Advance Dual Choice Ant Bait Stations. The bait food is carried back to the nest to kill the queen and destroy the entire colony. To use, simply place bait stations by ant trails or close to areas where ants are present, even on food preparation surfaces of next to food. Do not place baits on food preparation surfaces when food is being handled or no utensils that are used for food preparation. Dual Choice can also be placed adjacent to walls, electrical lines, potted plants, waste receptacles, sensitive electronic equipment, inside drop ceilings and wall voids or anywhere ant problems occur. Dual Choice Ant Bait stations are designed to be visually inspected, allowing monitoring.