Keep bedbugs away for up to 180 days. These bedbug eliminating balls contain a patent-pending repellent to drive bedbugs away. Once activated, each ball creates a 9' radius of protection that lasts up to 60 days. Just twist to open, then place behind beds and furniture or in your suitcase or car. Infused with essential oils for a light, refreshing scent. Chemical free and pet safe. Set of 3 for 180 days of protection.