PetSafe's PRF-3004W-20 dog runaway fence with ultra-light PIG19-10761 collar is specially designed for dogs. The system works as follows: A radio signal is sent from the fence transmitter over a wire antenna measuring up to 1340 meters. The Boundary Wire, which is buried, or attached to a fixed object, delineates the permitted area. This area is temporarily defined by boundary flags that serve as visual cues when training your dog. Your dog wears a receiver collar with switches that touch his neck and, once trained, can move freely within the pet area. When your dog reaches the Warning Zone, the Receiver Collar emits a warning signal. If the dog continues on his way into the Static Correction Zone, he will receive a harmless electrostatic correction via the contact points to attract its attention until he returns to the Pet Area. Technical details Suitable for dogs (at least 3.6 kilos) Suitable for land up to 10 acres (with extra wire). Waterproof collar. Adjustable correction distance. Visual and audible alert on the control box in case of wire cut. Automatic safety stop. Unlimited number of dogs (with additional collars). Box with lightning protection. Contents of the kit 1 transmitter base. 1 ultra-light 45-gram collar (PIG19-10761). 2 sets of electrodes (long coat and short coat). 150 meters of wire. 50 banners. 1 AC adapter for the base. 1 RFA-67 battery for the collar. Connectors to connect the wires.