Target Audience:Dog,Cat,Small Animals Size: 38cm or 70cm （Adjustable size for easy use） 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. Collar is water resistant It kills fleas within 24 hours and kills ticks within 48 hours of initial application. Package include:Pet collar *1/3