First and only EPA registered for indoor use natural rodent repellent that uses scent to keep rodents out. No poison means it's safe around humans and pets. Proven effective through EPA approved lab testing. Repels rodents for up to 30 days. Satisfaction guaranteed or your money back. Satisfied customers use Fresh Cab? to protect their campers and RVs by placing pouches under sinks (kitchen & bathrooms), by slide-outs, engine battery area and intakes and storage compartments (inside and out). 4 pouches per box.