The PE-902 2 Dog Pro Educator 1/2 Mile Advanced Training System by E-Collar Technologies is a modern e-collar designed with safety in mind. This training system is loaded with unique features, making it the most humane and effective trainer available. It has a range of 1/2 mile and is suitable for dogs 5 lbs and larger. The LCD display with backlight allows for precise control, and there are 256 levels of smooth “blunt” stimulation to choose from. The convenient transmitter is capable of controlling 2 dogs at once, and the small receiver size ensures a comfortable fit for your pets.