1 to 9 mile range.  The receiver works like this, I think it&#x27;s neat:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Chirp_compression" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Chirp_compression</a>