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Internet # 202072041

Model # FM231

Store SKU # 653097

Store SO SKU #1000110108

Wireless Driveway Alarm System with Buried Vehicle Sensor

$72.98
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  • Alerts you with a chime when your visitors enter your driveway
  • Up to a 400 ft. wireless range from transmitter to receiver
  • Multiple indoor receivers can be added
  • View More Details
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Product Details

About This Product

The Mighty Mule Wireless Driveway Alarm alerts you when a guest enters your driveway. The alarm uses reliable electromagnetic vehicle detection to sense when a vehicle is passing through your driveway. With electromagnetic technology, the Wireless Driveway Alarm avoids false alarms from an animal or person. With an extensive reception range of 400 ft. it adds security and convenience to your property.

Highlights

  • Electromagnetic technology that detects and alerts vehicle(s) moving within a 3 - 12 ft. radius of the sensor
  • Easy DIY (do it yourself) installation for your property
  • Alerts you with a chime to your indoor receiver when visitors approach
  • The alarm features a sensitivity adjustment to adjust to your comfort
  • Up to a 400 ft. wireless range from transmitter to receiver.
  • Backed by a 12 month Mighty Mule warranty and technical
  • Click here for more information on Electronic Recycling Programs
  • Return Policy

Product Information

Internet # 202072041

Model # FM231

Store SKU # 653097

Store SO SKU #1000110108

Specifications

Dimensions: H 3 in, W 13.5 in, D 5.25 in

Dimensions

Product Depth (in.)

5.25 in

Product Height (in.)

3 in

Product Width (in.)

13.5 in

Details

Color Family

Black

Connectivity

Wireless (Wireless Network Transmission)

Features

Audio Alert

Field of View

90 Degrees

Included

No Additional Items Included

Indoor/Outdoor

Outdoor

Pack Size

1

Power Source

Battery Operated

Returnable

90-Day

Sensor Location

Driveway

Sensor Recognition

Motion

Transmission Range (ft.)

400 ft

Warranty / Certifications

Manufacturer Warranty

12 months

Questions & Answers

How long is the wire between the sensor and transmitter?
ByOct 28, 2025
1 Answer | 
Answer This Question

Hi Brian, the length of the wire is 8 feet. Thanks for the question

By|Oct 31, 2025
    0/0


    The location where I would place the transmitter would be out of range of my wifi... approximately 150' -200' away from my wifi router. Will this unit still work as promoted, either out of the box or with additional hardware you could supply?
    ByOct 25, 2025
    1 Answer | 
    Answer This Question

    Hi John, yes, it still should work. As per the installation manual on Home Depot on that webpage under Product. Open up the installation manual. There is a picture diagram that will help you. Thank you for this great question.

    By|Oct 30, 2025
      0/0


      What is the installation instructions
      ByAug 13, 2025
      1 Answer | 
      Answer This Question

      Hi Mark, you can find the installation manual in every box and online at the Mighty Mule.com website. Also, we have videos and that site and YouTube. Thank you hope this helps

      By|Aug 20, 2025
        0/0


        Has anyone buried the sensor in the middle of their driveway? We have a dirt driveway that is over 20 ft wide, and would like to bury the sensor in the middle to have full coverage.
        ByJul 15, 2025
        1 Answer | 
        Answer This Question

        Hi Jeff, the only problem with that is you may hit the sensor, so it's better to have it on the side of the driveway. Thanks

        By|Jul 18, 2025
          0/0


          Can this device instead of triggering an audible alarm turn on a light when a car is detected? Hoping to use this system to safely leaving a hidden driveway and alert me when a car is approaching on the main road.
          ByJun 21, 2025
          1 Answer | 
          Answer This Question

          Hi Dmitry, unfortunately we do not have a light on this driveway alarm, but that's a great idea. I will pass this along to our engineers. Thank you

          By|Jul 7, 2025
            0/0


            How long do the batteries last and what type,how many?
            ByMar 13, 2025
            1 Answer | 
            Answer This Question

            Hi Mike, the Mighty Mule Driveway alarm takes 2 AA batteries. As long as the batteries are fresh, they should last as per the date. Hope this helps. Thank you

            By|Aug 30, 2025
              0/0

              (1)

              How to hook it up
              ByJan 16, 2025
              1 Answer | 
              Answer This Question

              Hi Nann, not sure what you mean, can you explain further? Thank you

              By|Jan 28, 2025
                0/0


                Purchased a couple months ago and now experience random alerts. We originally noticed it alerting a few days at the same time, however today the sensor has alerted at least 20 times and nothing metal is/was close to sensor. Batteries and reset tried.
                ByJan 6, 2025
                1 Answer | 
                Answer This Question

                Hi JFVCR, sorry for this inconvenience. We suggest calling our Tech Team, they would be happy to help. Call 1-800-543-1236 M-F 8am-6pm and Sat 10am-6pm EST. Thank you

                By|Jan 6, 2025
                  0/0


                  Viewing 1-8 of 118

                  Customer Reviews

                  3.9 out of 5

                  • 3.9 out of 659 reviews
                  • 73% recommend this product
                  Filter by:
                  Showing 1-10 of 659 reviews
                  Gravel Interference?
                  I bought this product for my mom who lives in the country down a long path. Path is constructed of geotextile fabric covered with 4" CABC stone. Installed as directed. Prior to covering up, I tested the product. No alert when driving on the path, but alerted when I drove on the grass off the path. Removed from the trench and set on the ground adjacent to the path. Same result. Not sure what the resolution is to this. Any suggestions?
                  by
                    • Recommended
                    Parts
                    I thought this alarm worked great!!! However moving to a different state the transmitt was damaged. I have been looking for just that part and not the entire system.
                    by
                    Response from Mighty MuleAug 26, 2024
                    Hello, Loyal Mighty Mule Customer, thank you for digging up and moving to your new location. You must like it. As far as parts, we are sorry to say we do not stock replacement parts for this item. However, you can buy a new one on the internet at varies retailers. We are sorry for this inconvenience. Thank you
                      • Recommended
                      This detector / alarm was easy to install and demonstrates a good transmission range. I mounted ...
                      This detector / alarm was easy to install and demonstrates a good transmission range. I mounted the detector adjacent the driveway and buried the connecting cable inside some sealed tubing. A few inches of slack allows me to manipulate the transmitter plug connector as necessary. One bit of advice to remember is that, if the power at your house goes out - or even flickers - the driveway alarm, likely, will need to be reset when power is restored. This is a very welcome addition - to alert you when visitors, or a deliveryman, arrives or departs. As installed, the detector is quite inconspicuous. See photograph 1. I painted the installation brown; and I suspect that, after some weathering, it will become even less noticeable. See photograph 2.
                      by
                      Response from MightyMuleSupportMar 23, 2021
                      Rod, thank you so much for this detailed review and rating. We at mighty Mule appreciate you taking the time to explain. Thank you for being a Mighty Mule Customer.
                      • DIY
                      • Verified Purchase
                      • Recommended
                      3 found this review helpful
                      We are so happy with our Mighty Mule driveway alarm. It is so easy to install and works fantastic...
                      We are so happy with our Mighty Mule driveway alarm. It is so easy to install and works fantastic. And the price is comparable to the wireless driveway alarm. We tried the wireless first but it was going off all the time and nobody was there. This driveway alarm has been flawless.
                      by
                      Response from MightyMuleSupportFeb 26, 2021
                      JP, from all our us at Mighty Mule we appreciate your rating and review. Thank you
                      • Verified Purchase
                      • Recommended
                      4 found this review helpful
                      I purchased this driveway alarm with the hopes that it would transmit activations 400', or somewh...
                      I purchased this driveway alarm with the hopes that it would transmit activations 400', or somewhere close to that, through the dense foliage along our driveway. I planned on placing it on a high spot about that distance away. Unfortunately, as the manufacturer's literature correctly suggests, dense vegetation does greatly impact the signal strength reaching the receiver. I ended up placing the transmitter about 200' away and had to raise the receiver to the highest point I could in the second story of our home and on the side of the house closest to the transmitter. It works very well that way. I also used a non-metalic paint to camouflage the transmitter's shiny black plastic and hid it behind a large tree by a rock wall, but made sure to place it on the side of the tree and rock wall facing the receiver. I would like to see a stronger transmission signal in future models (if the FCC allows this), or the option to easily connect both the receiver and transmitter to coaxial wires for external antennas. Running a coax up one of my trees would increase the range of the transmitter quite a bit. Other than that, the unit has been working flawlessly for the last three weeks and I highly recommend the Mighty Mule.
                      by
                      • DIY
                      • Verified Purchase
                      • Recommended
                      4 found this review helpful
                      So far so great!
                      Skeptical at first . I followed directions adjusted as described and, volia. Simple instal decent price. Tim3 will tell. These things have a tendency to malfunction about 3 months in. Fingers crossed. I will follow up either way. Go mighty mule.
                      by
                        • Recommended
                        I had previously owned a similar product (GE Smarthome 45105 Wireless Monitor) but it died so I b...
                        I had previously owned a similar product (GE Smarthome 45105 Wireless Monitor) but it died so I bought this one. It so far has worked fine giving next-to-none false signals (the previous one without the buried sensor gave a lot). Had one issue where the 'USB' type connector at the transmitter detached as I was inserting the post into the ground. There is no way to secure it (poor design) so if it stops working, that is where to start. Otherwise it appears to be a good product that only alarms if a 'larger metal object' passes it.
                        by
                        • Verified Purchase
                        • Recommended
                        2 found this review helpful
                        This is the perfect driveway alert. Install was fairly easy. I live in an area with a lot of dee...
                        This is the perfect driveway alert. Install was fairly easy. I live in an area with a lot of deer and neighbors feed the feral cats so there are a lot of critters that will set off other detectors that use motion detection. This uses metal detection and I don't get false alarms. I have a long driveway and can't see vehicles that are parked on the side of my house. I buried metal detection along the side of the driveway about 100 feet from the house. I also bought an extra receiver for inside the house, I put it in the master bedroom so we will hear an alert if someone enters the drive way at night. The other receiver was placed in the living room. I put the transmitter behind a tree about 10 feet from the buried metal detector and dug a trench to run the wires to transmitter. Cars entering driveway can not see it behind the tree. I painted the plastic mounting pipe green to blend with grass. I have the same Mighty Mule for four years but just bought a second one to mount in a secret location. After 4 years Roots from the tree grew up inside the plastic mounting pipe and into the transmitter and started causing false alarms. On my new install I drilled a hole through a cork and then slit the cork so I could place wiring inside cork without having to force the USB type connector through the cork. Hopefully this will keep tree roots from re-entering with the wires. It has been working great again for 3 weeks now.
                        by
                        • Verified Purchase
                        • Recommended
                        4 found this review helpful
                        Dakota Alert has 2500ft range with a number of transmitters from magnet to motion all which can t...
                        Dakota Alert has 2500ft range with a number of transmitters from magnet to motion all which can trigger different tones. Better purchase I can assure you. It even has a 12v output where I'm triggering driveway lights to turn on when someone enters driveway.
                        by
                          6 found this review helpful
                          Wireless Driveway Alarm! Love it!
                          This was so easy to install! Works perfect. Wished I would have bought one of these years ago. I highly recommend this alarm.
                          by
                          • DIY
                          • Verified Purchase
                          • Recommended
                          1 found this review helpful
                          Showing 1-10 of 659 reviews

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                          Product Snapshot

                          Ideal for driveway security, this wireless alarm system offers reliable vehicle detection and a 400 ft. range.
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                          Wireless Connectivity

                          Smart Home Integration

                          Tamper Alerts

                          Battery Backup

                          Weather Resistance