Designed for flexibility
In Bear Sentry’s modular system, Expansion Packs are key.
If you’re outfitting a group or camping with friends,

The Bear Sentry energizer can support up to 20 km of wire so it’s really up to you.
You can also convert a Backcountry into a Base Camp (or vice versa) because the models share the same powerful energizer and many common components. You just have to buy Expansion Packs for the other fence.
The flexibility of Expansion Packs can give you “Two Bear Sentries in One” for any sort of trip into bear country.