PetSafe PIF-300 Wireless Pet Containment System, 90 ft, 5-Correction Level, 6 to 28 in Neck, Lithium Battery

Wireless Pet Containment System keeps pets happier while you breathe easier. A simple signal from a small unit in your home to your dog's collar is all it takes. They learn their new yard boundaries quickly and comfortably and the collar will remind them with a tone or static correction if they forget. Before you know it, it's all happy playing and no random straying. Covering an area up to 1/2 acre, it's portable, requires no buried wires and sets up in 1 to 2 hrs.