The pet fence difference you can feel for yourself! It's one thing to make a product that keeps your pet safely in the yard, it's another to thoughtfully design a fence with features that make it safer and more comfortable too. Perimeter's exclusive Comfort Contacts cushion your pet's neck with soft rubber, unlike the hard steel probes used in other pet fences. Veterinarians prefer the softness of the Comfort Contacts to help reduce the incidence of skin irritations. Chances are you heard about pet fencing from a friend or neighbor. Why worry about buying a fence on the same frequency as your neighbor. The Perimeter Ultra Comfort Contact fencing you gives you the flexibility of changing the frequency. With the Perimeter Ultra Comfort Contact fence not only do you have the ability to change frequencies you also have the ability to change stimulation settings to achieve a custom range of correction options to fit your dog's specific temperament. In fact, each dog's collar can be programmed to provide only the necessary correction level to be effective. Perimeter's exclusive Comfort Contacts cushion your pet's neck with soft rubber, providing a lighter touch solution to hard steel contacts. Veterinarians prefer the softness of the Comfort Contacts to help avoid serious skin irritations. Includes: One advanced wall mount transmitter One waterproof collar receiver 2 Waterproof Splices 500 Feet Factory Grade Gauge Wire 50 boundary flags Instruction/Basic Training manual Instruction/Basic Training DVD Comfort Contact Probes Additional Rubber Comfort Contact tips Long Hair Steel Contact Probes Non-correction long and short training probe covers High Quality nylon collar Available with Four Different Wire Gauges: Gauge Factory Wire 18 Gauge Heavy Duty Wire 16 Gauge Heavy Duty Wire 14 Gauge Heavy Duty Wire We recommend Heavy Duty Wire in any areas where the wire is installed above ground with our Dog Fence Staples, may experience wear and tear such as rocky conditions or cold weather climates. Learn more. Patented Temp Check Only Perimeter brand dog fence systems feature internal circuitry which provides stable operation over a broad range of temperatures.