The Combat Max Defense System Brand is designed for complete cockroach extermination and prevention. Combat Max Small Roach Baits and Combat Max Roach Killing Gel is the perfect combination?use bait stations in common places where roaches appear and use gel in cracks and crevices where they hide. The Combat Max Defense System Brand starts working in hours to exterminate roaches and helps keep infestation under control for up to six months. For both indoor and outdoor use. This package includes 12 child-resistant cockroach killing bait stations and 1 syringe of roach killing gel. How Combat Max Defense System Brand Roach Killing Bait Works: 1. Roaches enter the bait station and eat the bait. 2. Roaches take the bait back to the nest. 3. Roaches share the bait killing other roaches and destroying the nest. The gel attracts roaches in search of food and water to the bait. Roaches ingest the bait and return to die in their nest.