The revolutionary Flea Doctor™ kills fleas on your pets as you groom their fur. Great for cats and dogs of all ages, the safe, easy-to-use comb releases a gentle electrical charge that quickly kills fleas, but is harmless and painless for your pets. No pesticides or chemicals needed! The comb gathers the dead fleas, and an eject button lets you discard them hands-free. Req. 2 "AA" batteries (sold separately). Plastic. 6 1/2"L x 3 1/2"W.