Kills in hours. Kills roaches at the source. Defends your home against roaches. Kills roaches at the source. Keeps killing for up to 6 months. How Combat Source Kill Max R1 Works: 1. Roaches enter the bait station and eat the bait. 2. Roaches take the bait hack to the nest. 3. Roaches share the bait, killing other roaches and destroying the nest. Bonus pack - 50% more free. Made in USA.