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. No. 04183: Duration: 7 mo, Dog Size: Older than 6 wk, Reflective: Yes, Pkg Qty: 1, Package Type: Box Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!