Product recommendations

I’ve seen a lot of products similar to what I am looking for, but nothing that exactly fits my needs, so I am hoping for help.

We have a 4 acre square plot of land. It’s literally a 2 x 2 square. We don’t have a fence around the perimeter. I was hoping to find a perimeter alarm that I could set up on the corners of the property to alert me if anyone were to cross the line. The best I could find have only about 25ft of range from the sensor, which would mean I’d have to put a sensor every 8ish yards along the perimeter of the property

Is there a better option? Thanks for the help.

submitted by /u/TheVikingCoffeeMan
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