The Mighty Mule FM231 system utilizes specialized electromagnetic induction technology for vehicle detection. Technical specifications identify a 433.92MHz transmission frequency, which performance metrics show to be susceptible to signal collisions in environments with high RF traffic. The hardware is designed to filter for moving metal, effectively ignoring organic movement from pedestrians or wildlife.
Structural analysis of the transmitter housing reveals mechanical weak points in the battery compartment seal, which can lead to terminal corrosion. The system is powered by two AA batteries, and technical documentation recommends the use of lithium chemistry to prevent voltage drops during winter operation. Aggregated data indicates a real-world effective range of 150-200 feet when transmitting through residential walls, despite a theoretical 400-foot rating.
- Detection Mechanism: Magnetic Induction Wand
- Transmission: 433.92 MHz
- Filtering: Vehicle-only (Excludes organic motion)
Operational insights confirm that the system fails to detect electric vehicles (EVs) that feature high levels of electromagnetic shielding. The RF signal is non-encrypted and lacks frequency hopping, which limits its application in high-security environments. Monitoring is provided through a simple plug-and-play indoor receiver that generates an audible alert upon induction trigger.
Users who require a system that specifically filters out animal movement to avoid false positives should consider the Mighty Mule FM231 Wireless Driveway Alarm System for its magnetic induction wand. This specialized sensor is a unique variant within the driveway and yard alarms market.
