Combat® Source Kill1 Small Roach Advanced Formula*. Kills roaches & eggs at their source. *Vs. the previous Combat bait formula. 12 child-resistant bait stations. Kills roaches and eggs for 3 months. This product provides complete roach control. Prevents roach reproduction. How Combat® Source Kill1 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. Guaranteed to work or your money back! Call the Combat® helpline at 1-800-426-6228 for information. ©2010 Combat Insect Control Systems. Made in USA. Please recycle empty carton.