The PetSafe Vibration Remote Trainer is a safe, effective way to teach your dog basic obedience and encourage better behavior. Communicate with your dog without a leash from up to 100 yards away with the push of a button. Use the handheld remote with a digital display to choose from 16 levels of vibration stimulation or tone-only mode. The vibration pattern is especially effective for dogs who are hard of hearing or deaf. PetSafe brand is here to help you and your pet LIVE HAPPY TOGETHER.