When bears wander into a campsite, it means they're either predatory or have become used to eating garbage or human food. In either case, they're dangerous, and that's why this Bear Shock® electric bear fence delivers 6000 volts to any bear that touches it. Far better than stringing up tin cans or clanging pots and pans together to scare bears away, this Bear Shock means business, and bears figure that out the instant they get zapped. This ultra lightweight, first-of-its-kind, battery-powered fence encloses a 45 sq. ft. area to protect you and your camping equipment. It also works well as a horse corral or protection for a small plane or other vehicle. It fits in an 8in. x 25in. storage bag and includes 3 sets of poly-wire (2 hot, 1 ground); eight 4ft. posts that work well in Alaskan tundra; flagging tape; and 1 ground stake along with 1 energizer that runs on 2 D-cell batteries (not included).