Let your dog run—not run away! Fast, simple do-it-yourself installation Absolutely harmless to your dog No unsightly fences, posts, or transmitters to spoil your landscaping Safety and security for your pet are now as close as your own back yard! Smart Dog in-ground pet fencing systems set the standard for results you can trust. Not a rocket scientist? Don’t sweat it—installation is a snap in only three basic steps. Smart Dog systems consist of a buried yard wire connected to an indoor radio transmitter. When the dog approaches the wire, a special collar worn around his neck delivers a brief, totally harmless correction that discourages him from crossing the boundary. Patented run-through prevention is a standard feature on all Smart Dog systems. Corrections typically become less frequent as the dog learns his new limits. Dog training questions? Innotek's toll-free 800-number hotline provides expert training support—a Smart Dog exclusive! Don’t trust your dog to anything less than Smart Dog! Introducing our newest top-of-the-line full-feature system! For yards up to 25 acres in size. Features a redesigned interior wall-mounted transmitter that complements virtually any décor. All-new rechargeable collar receiver is totally waterproof and looks slimmer and shapelier on your dog. We added other safety features for one reason only: so you have peace of mind as your dog plays safely in your yard. These features include battery back-up (AA batteries not included), deluxe external lightning protector, audible and visual wire break alarm, reflective safety neck strap, small waterproof collar receiver and recharge reminder. Boundary self-check displays system status 24/7. Save installation time with 100 ft. of pre-twisted FasTrak wire. Includes 500’ of single-conductor ground wire, indoor wall-mounted transmitter, two rechargeable waterproof collar receivers with neck strap, boundary wire, training support 800 number, complete installation instructions, video, training flags, and accessories.