It is a responsibility of a dog owner to protect their dogs from any form of danger. In the same way, you also need to ensure that the people around your dog are safe. With those considerations in mind, the Perimeter Wireless Fence PWF-100 will be the best dog fence for your needs.
Petsafe Wireless PIF-300 is a large and clunky transmitter originally used as wireless dog fence of PetSafe. It utilizes wireless fence relatively for a medium size collar.