Target Audience:Dog,Cat,Small Animals Size: 38cm or 62cm （Adjustable size for easy use） Kills fleas within 24 hours and kills ticks within 48 hours of initial application. Package included: For Cats (All Sizes All Weights) Flea & Tick Collar PRODUCT For 8-month prevention and treatment of ticks and fleas on cats and puppies 10 weeks of age and older and above 16 lbs How Works The active ingredients spread from the site of direct contact over the skin surface of the cat or dog. Sustained release technology Works similarly to a monthly topical, but as the active ingredients wear off over time, a new supply is continuously replenished in low concentrations. The active ingredients spread from the site of direct contact over the skin surface. Polymer matrix technology is designed to slowly and continuously release the active ingredients over eight months, a duration that makes it clearly different from other collars.