Wireless Driveway Alarm System - FM231

Wireless Driveway Alarm System

The Mighty Mule Wireless Driveway Alarm (part# FM231) monitors and alerts you when someone enters your driveway or property entrance. The easy to install Wireless Driveway Alarm uses a reliable electromagnetic vehicle detection system that senses only mass metals is motion passing through your driveway or property entrance. When a vehicle has passed through the Wireless Driveway Alarm you are notified by a chime on the include indoor base station. This system features a wireless range of 400 ft. and with our electromagnetic technology will only detect cars, truck, UTV’s or tractors avoiding any false alarms notifications.

  • Mighty Mule Gate Openers not required for operation.
  • Ideal for any home, property or business that is lacking a driveway gate.
  • Easy to install: Simply bury the included Electromagnetic Sensor next to your driveway or property entrance to maximize sensing range. Place the indoor receiver in your desired location & adjust the indoor receiver preferred volume.
  • Up to a 400 ft. wireless range from outdoor transmitter to indoor receiver.
  • Requires 2 AA batteries for operation (not included).
  • Alerts you with a chime to your indoor receiver when visitors approach.
  • Low battery indicator on both the indoor receiver and outdoor transmitter.
  • Additional indoor receivers can be added to the Mighty Mule Wireless Driveway Alarm (Part # FM231-R).
  • Backed by a 12 month Mighty Mule warranty and technical support.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

  Buy Online   Find a Retailer
Buy at Amazon
Tractor Supply
Home Depot
Mighty Mule Store


Mighty Mule FM231 Wireless Driveway Alarm is rated 4.5 out of 5 by 18.
Rated 4 out of 5 by from This is my second driveway alarm from Mighty Mule. Once installed they work pretty good. Do need a choice of getting one with a longer cable as the one supplied is kinda short for some installations. The only thing I dislike about it is, I CAN'T HEAR the alarm if in another room even when turned to loudest setting! Product would be 5 stars if it had a LOUDER sound which could be adjusted to the user's preference.
Date published: 2018-05-10
Rated 5 out of 5 by from Driveway alarm Driveway alarm is great. I think you need a louder sound for it. I have mine turned up all the way and you need to be sitting next to it to hear it. Just thought you might like to know.
Date published: 2018-01-18
Rated 5 out of 5 by from alerts every time with no false alarms installed almost a year ago because we can not see the driveway from our back patio. its a little work to install but definitely adds a level of security to a long driveway.
Date published: 2016-12-20
Rated 4 out of 5 by from False alarms after 2 years of service As the title says, false alarms.after a year of service. After doing all the common sense checks and troubleshooting I discovered that the alarms were temperature related. I did not need the coil connected to set it off. While holding it in my hand I could set it off with the heat from a hair dryer. Bottom line after taking it apart, I discover that capacitor C4 (.47uf) on the board, was the heat sensitive part. I replaced C4 and it has been working fine. The only thing I can think of is that you got a bad batch of capacitors.
Date published: 2020-09-12
  • y_2024, m_2, d_23, h_7
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.38
  • cp_1, bvpage1
  • co_hasreviews, tv_1, tr_17
  • loc_en_US, sid_FM231, prod, sort_[SortEntry(order=HELPFULNESS, direction=DESCENDING), SortEntry(order=POSITIVE_FEEDBACK, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_gto
  • bvseo_sdk, p_sdk,
  • CLOUD, method:getContent, 155.91ms