Advantage For Dogs provides fast, effective and convenient treatment and control of fleas and ticks for dogs and puppies 7 weeks or older.  Advantage kills fleas within 12 hours, prevents reinfestation for at least 4 weeks, and easy & conveniet to apply.  The Advantage Green box contains the active ingredient Imidacloprid, and comes in a 4 pack, one applicator per month, for a total of 4 months for dogs 10 lbs and under.  Advantage is a registered trademark of Bayer.