Teach your dog to be the most well-mannered dog in the neighborhood with the PetSafe SMART DOG Trainer. The innovative technology of this trainer uses your smartphone as the hand-held remote. Simply download the PetSafe SMART DOG app (compatible with iOS 8, Android 5 or newer) and use it to send a tone (beep), vibration or 15 levels of static stimulation to your pet's collar. The trainer connects to your smartphone via Bluetooth and with a 75-yard range, can be used anywhere inside or outside your home. The collar is both waterproof and rechargeable. The training collar fits dogs 8 pounds or more and adjusts to fit neck sizes up to 28 inches.