Fast, simple do it yourself installation. Safety and security. 3 step installation. Designed for yards up to 5 acres in size. Water resistant battery operated collar receiver. Run through prevention and timeout between corrections helps dog learn limits quickly, safely. Includes 500' of single conductor ground wire, indoor wall mounted transmitter, 1 collar receive with neck strap, boundary wire, battery, training support 800 number, complete installation instructions, video, training flags, and accessories.