http://www.acedogsupplies.com.au/ We review the Petsafe In Ground radio fence - PRF-3004W. If you are considering a containment system for your dog, then take a look at this video. One of the key advantages to the Petsafe invisible fence is that you can add different sized containment collars to suit the small to the very large pet, making it an ideal solution where multiple pets need containment.