Mighty Mule FM231 Driveway Vehicle Alert System, Black

The wireless driveway alarm alerts you when a vehicle enters or exits your property. When a vehicle passes the sensor, the indoor receiver emits a chime. It has a wireless range of 400 ft (121.9 m) and will not be activated by people, animals or wind. The indoor receiver can be mounted on a table or on the wall. Multiple indoor receivers (up to 3) can be added for more convenience. Detects moving vehicles and not a motion sensor.

• When a vehicle passes by the sensor, an outdoor transmitter communicates wirelessly to an internal base station up to 400 ft, away and sounds a pleasant chime
• When a vehicle passes by the sensor, an outdoor transmitter communicates wirelessly to an internal base station up to 400 ft, away and sounds a pleasant chime
• Instantly alerts you when someone pulls into or out of your driveway
• Easy-to-install electromagnetic sensor wand is buried next to your driveway, and detects mass metal moving within a 3 to 12 ft radius of the wand
• Low battery indicator on both the Indoor receiver and transmitter