Sounds interesting. What brand, model is the 1/4 mile unit?
They call it "the 1/4 mile" model
Not joking or kidding. Same brand as Eddie posted in the OP. The model he listed via link, is the $99 "500' model". I know, you'd think they'ed actually have part numbers or something.
Did have to go out today and lower the one sensor. Found out it was picking up the Pilot and truck, but it wouldn't pick up the two smaller sedans. Must of had it mounted too high per line of sight.
As far as false alarms, during the day, it's not bad. Strange as it seems, at night we turn it off just for the deer or neighbors dog. The reality is anything can set off the home lights as well at night, and if you come down our driveway at night when things are quiet, generally the dogs will start going ballistic and let us know. This is why we got one first, my wife wants to know before the dogs go ballistic during the day if she's in a meeting (works full time from the house).
I do like that one model that does cars only (that was posted here), but at half the price and no digging with the brand Eddie is asking about, something I can live with.
I will probably get an extra outdoor sensor for the back field just to let me know if anyone is driving there from that access point off the main road.