For those who want flexibility from their Bear Sentry.

One Expansion Pack can increase the area protected by a Backcountry fence from 25 square meters to roughly 65 m² (in a hexgonal layout).

Add more to outfit a group or camp with friends. The energizer can support up to 20 km of wire so almost any sized enclosure is possible.

Because the Bear Sentry system is , Expansion Packs can also convert a Base Camp model into a Backcountry.

For extremely dry conditions, you can use at least one Expansion Pack to set up a .