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They do work in hills/mountains but you may be limited on your range depending on area.
Sorry, there was a problem. Please try again later.I have used mine here in the rocky mountains with little to no interference within a couple miles. Cottonwoods and pines had little effect on their transmission or receiving capability.
Sorry, there was a problem. Please try again later.No- ours wouldn't even work in sight of each other.
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