This flea collar was an answer to all my flea problems last year. To date, I have no issues with fleas here anymore. I had purchased lower priced flea collars and had absolutely no changes, my 2 dogs were itching, crying, rubbing on anything and everything that they could. I bought them each one of these flea collars and that was it, my problems and theirs were over never to return again… because I will always have them wearing this flea collar for their well being and my sanity… LOL All kidding aside, they will never be without this flea collar. I love my pets and I only want the best for them, and not to watch them suffering from flea bites. I Highly Recommend This Collar.