This dog training collar comes with a transmitter and a wireless collar receiver. The transmitter can send a remote signal to the dog’s dollar that will beep, vibrate or shock accordingly within a range of 820ft. Whether your dog is chewing furniture, excessively barking, or pulling the leash while you’re out on a walk, this transmitter and collar receiver will give you the ability to teach your dog right from wrong with the simple press of a button.