The PetSafe PDT00-10676 Comfort Fit Little Dog Remote Trainer provides all of the features for reliable, safe and humane training you want in a companion dog trainer. It's designed for dogs 8 to 40 lbs. With a tone only feature, 10 levels of electronic stimulation and a 100 yard range you can easily train your dog in the familiar surroundings of your yard. The tone only button allows you to provide an audible warning tone prior to using an electronic correction. As your dog learns to recognize and obey the tone you can quickly eliminate the need for electronic correction. The 10 levels of stimulation allow you to find the lowest possible level for your dog. The new QuickFit buckle allows you to put the collar on or remove it in a matter of seconds. It also provides a perfect fit every time for added comfort. PetSafe PDT00-10676 Comfort Fit Little Dog Remote Trainer features: Intended for dogs between 8-40 lbs. Range up to 100 yards 10 levels of stimulation Tone Only buttons QuickFit™ buckle provides a quick release and a perfect fit every time Durable, waterproof Receiver Collar Weatherproof hand-held Transmitter