Mighty Mule Fm231 Wireless Driveway Alarm

Mighty Mule FM231 Wireless Driveway Alarm – Accurate and Reliable The Mighty Mule driveway alarm is a smart way to keep alert. Featuring an outdoor electromagnetic sensor this driveway alarm detects vehicles that pull up into your driveway. The transmitter passes on the signal to the base station that sounds a chime. With a wireless range of 400′ this alarm functions with efficiency.