Product features: Helps pets avoid fleas, ticks, lice, and mosquitoes through the scent of essential plant oils. Suitable for pets: large, medium, and small cats and dogs. The length of the dog collar is 63.5 cm/25”. It can be shortened. The protection time is 6-8 months. The flea collar is waterproof and rain-resistant, but to not affect its lifespan, remove the collar from your dog when bathing and swimming. Notes: Cats and dogs should not bite the collar. If your pet is not feeling well, remove the collar immediately. Wash your hands after touching the collar. Children are not allowed to play with the collars.