Keep your pet in the yard. Will transmit up to 10 acres or 2800 ft of wire. One level correction. 3 setting boundary width control, can use 14 to 20 ga wire. Includes 500 ft of boundary wire, ultralight receiver with short contact points and adjustable collar, fence transmitter, 2 wire nuts, power adapter, test light, 2 long contact points, one 6-volt battery, 50 boundary flags, operating and training guide and installation and training video CD. System also features a wire break alarm, 2 red indicator lights (loop and power) and a 30 secs safety timeout. Complies with FCC regulations.