Mighty Mule Driveway Alarm

Reliable electromagnetic vehicle detection senses mass-metal motion passing through your driveway
Included indoor receiver emits a clear audible chime when a vehicle enters or exits
Expandable system lets you add multiple FM231‑R receivers to cover larger properties and different locations
Easy DIY installation with included mounting stake—bury the sensor beside your driveway and place the receiver where you need it
Wireless connectivity reaches up to 400 ft between the outdoor transmitter and indoor receiver

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