The Radial-Shape 2 provides a circular boundary with a wide trigger zone. The wireless receiver senses when the collar approaches the trigger area and sends a signal to the collar, which in turn provides an audible warning to the dog. Alternatively, consumers can set the collar to provide a pulsing, adjustable shock to the dog as it approaches the boundary. Suitable for dogs over six months of age, the Havahart Radial-Shape 2 is appropriate for all breeds weighing over 8 lbs. with a neck size between 14 and 26 inches. It is a popular choice because of the compact size of the receiver and the quality of the construction.
Pet Containment Systems, Wireless Dog Fences, & Extra Radio Collars.
A uses a much simpler design than a wired system. It consists of a transmitter plugged into an outlet, which sends a signal to the dog's collar. If the dog moves outside of a defined radius, with the transmitter as a center point, the dog receives a shock.
Wired or Wireless Pet Containment
A wireless system is much easier to set up than a wired system, since it usually just includes a collar and transmitter. Most transmitters can be adjusted to make certain that the radius does not extend into an area where the dog is not supposed to go. If a circular area is not a good fit for a dog, two transmitters can be used to create more than one overlapping zone. If the dog passes from one zone to another, they do not receive a shock. The drawbacks of a wireless system are that it is difficult to designate an area as one that a dog cannot enter without shortening the radius. At the same time, there are corners and other areas of a yard that may not ordinarily be off limits for a dog, but that would be blocked by the circular shape of the boundary.
Petsafe Instant Fence - Wireless Dog Fence PIF-300 FREE SHIPPING