✅FAST ACTING WITH NO BITING REQUIRED – REPEALS and KILLS ticks and fleas upon contact. Your furry friend doesn't need to be exposed to bites. Oral flee medications, pills, or chews require that your pet be bitten before they can work. This could expose your dog to flea-borne diseases like Lyme disease. ✅VET APPROVED, WATERPROOF BIO FORMULA - 6 month of strong protection: New German Technology gives you effective flea and tick preventic for dogs and Puppy for 6 month! ✅COST-EFFECTIVE PEST DEFENSE - collars use advanced technology to refine essential plant oils into a PVC carrier to reduce chemical irritation. Still, they are not suitable for pets that are sick or have skin allergies. ✅NO MESS TREATMENT AND CONTROL - effective against Fleas - larvae, lice, Ticks and Mosquitoes. This flea product for dogs was designed to be HELPFUL either for small medium size or extra large pets. ✅SUITABLE FOR ALL SIZES - the rolf club collar in pack is easy adjustable, maximum length 26.5 inches. Provide veterinarian level of care at an affordable and fair price.