Easy to install, this system is great for any size dog. You choose the configuration to not only keep your dog safely at home, but also clear of out-of-bounds areas such as gardens and pools. Patented run-through prevention offers secure, reliable containment. The Basic In-Ground Pet Fencing System SD-2000 is ideal for yards 1/4 to 5 acres in size. The compact (2.5 oz) water-resistant collar receiver operates on a long-life 6V battery. An economical way to provide safety and security for your dog. Includes wall-mount transmitter, collar receiver, video, complete instructions, battery, training flags, extra probes and 500' of wire. Features: Transmitter range: up to 5 acres of property500 ft. / 20 gauge, burial approved wire included Water-resistant collar For technical assistance with this product, please call Innotek customer service at 800-826-5527.