Pup&dog rflct f&t collar. Kills and repels both fleas and ticks for up to 7 months PLUS it kills and prevents flea eggs for up to 7 months, thereby stopping the flea life cycle and preventing re-infestation. Focuses the pesticide towards your pet and away from you. Reflects direct light for up to 450" for an added dimension of nighttime safety. Water-resistant. For use on puppies 6 weeks of age and older.