This Innotek collar is perfect for training dogs of all breeds and sizes. With an sound-based control method, it allows for effective training without the need for physical correction. The blue collar is microsized and lightweight, making it comfortable for even the smallest lap dogs. The SD-70 model comes with a training DVD, providing step-by-step instructions for effective use. This unit, manufactured in China, is a great addition to any dog owner's training toolkit. Please note that this item may contain a special handling material and California Prop 65 Warning, which can be found on the website dtsc.ca.gov/hazardouswaste/perchlorate.