Hartz ultra guard plus topical flea and tick prevention of 5lbs and over is a monthly treatment that rapidly eliminates fleas within 15 minutes. Kills fleas brown dog and deer ticks flea eggs and repels mosquitoes for 30 days. Features the patented pro-cision flo applicator system that penetrates pet hair allowing for application of treatment at skin level. The quick-drying formula stays on and does not rub off.