[amazon.com](https://npw.clicorice.ca/links/iERGQo) has the Guardline GL5000 1/4-Mile Wireless Driveway Alarm for $89 – $30 off coupon (check “Apply coupon” box) = **$58.99** with free shipping.

* Detects motion in up to 4 different zones, with up to 4 sensors per zone.