1/2 Mile Hosmart Rechargable Driveway Alarm Wireless Sensor System & Driveway Sensor Alert System Weatherproof Security Ou.

don't like the tones but works well. set at about 3 feet up and 100 yards out. unit still picks up birds and bugs.

I love having these on our property. We have one at the front of the property entrance and one at our back entrance. They have worked great! I love having the extra security. The chime is loud enough that you can hear it throughout the house. It is very durable and hasn’t had any problems in bad weather.

best if you pair these by pressing power button 5 sec till 4 zone lights flash then put your batteries in sensor and wave you hand , make it go off then do the others . DON'T do this at your house the neighbors may have one too . do this far away from your home over 1/2 mile you should not get false alarms this way but who knows this frequency is generic probably 433/315 or something like everyone else has been using for remote crap don't they know amazon sells tons of this stuff all using same frequencies . WE ALL HAVE THE SAME CRAP WORKING ON SAME CHANNELS, ITS ANNOYING AS HELL

So far, product is working better than expected.

It picks up movement from rain wind mosquitoes and flies I found it totally impractical and waste of money