The PetSafe Remote Spray Trainer is designed to help train your dog with a burst of spray. Whether you are taking an off-leash walk outdoors, or working on commands at home, this Remote Spray Trainer makes dog training easy. The collar has three training options – tone, vibration and spray stimulation—and a range up to 300 yards, making this collar perfect for small hikes and public outings with your pup. At the push of a button you can send a signal to your dog?s collar. The collar includes both a citronella and an unscented spray refill cartridge, so you can determine which one works best for your dog.