The Pet Safe Radio Fence for small to medium dogs is the ideal dog fence for keeping your dog safe, whilst giving him ample space to explore. This style of electric pet fence is suitable for running along the ground or can be used as an underground dog fence. The Pet Safe Radio fence uses wire which is connected to a signal unit, and is then used to create an electric boundary. The beauty of this electronic dog fence is that it is used with a comfortable receiver collar, which is safely worn by your dog. The Standard Radio Fence is suitable for use with small to medium dogs, over 2.3kgs. For larger dogs it is advised that the Pet Safe Radio Fence for Large or Stubborn Dogs is used. Key Benefits: Includes wire for up to a 1/3 of an acre which can be extended to up to 10 acres with additional wires. Includes a receiver for your dog and is suitable for small and medium breeds from 2.3 Kg weight. It is recommended that for larger dogs, the Pet Safe Super Radio fence, is a more appropriate solution. Includes flags for training your dog to recognise the fence and an instructional video for setting up the Pet Safe system.