I purchased a collar for my large dog. It broke while on his lead while my husband was outside with him. Our dog only had the collar 4 weeks. I emailed them and asked for a refund. They said they would send another collar. I told them why would I want another collar? I'm not taking a chance of losing my dog. Quality is poor if it breaks in 4 weeks. No refund option. It took him 24 hours to respond.