The PetSafe Elite Little Dog Remote Trainer is a reliable, easy-to-use tool to help you train your dog off-leash. At the push of a button, the remote sends a signal, activating your dog's receiver collar from up to 400 yards away. The collar delivers a safe, static correction to get your dog's attention. Your dog will quickly learn the association between his behavior and the correction. Spend less time training and more time enjoying your dog.