Our pet repellent collar contains lavender oil, camphor oil, peppermint oil. It can remove parasites from pets, prevent the growth of parasites, and protect the health of pets. The way to use it is very simple: first dry the hair on the pet's neck, then open the package, take out the collar to put on the pet, and adjust the size as needed. After use, it can remove parasites, maintain pet health, and make pets healthier.