This unique, patented comb works by detecting and killing the adult fleas found on many cats, kittens, short hair dogs and puppies. Fleas are killed on contact as you comb your pet. The Flea Zapper Electronic Comb emits a low electronic charge that is harmless to your pet, but deadly to fleas. It eliminates fleas on contact and works on many different hair types This approach to flea control is less stressful on your pet than other treatment programs. For the best results please read the following directions.