Guardline 1/4 Mile Range Outdoor Motion Alert & Driveway Alarm | Guardline Security

Guardline 1/4 Mile Range Outdoor Motion Alert Set

$209.99 -24%

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  • Long Range: 1/4 Mile distance tested in real world conditions
  • Easy to Install: Pair and pick a melody with just a few steps
  • Four Distinct Zones: A different chime and LED alert for each zone
  • Fully Expandable: Supports 16 Sensors and Unlimited Receivers
  • Industry Leading Warranty: 2 year warranty

Guardline 1/4 Mile Range Outdoor Motion Alert Set


Quick Start Guide has you operational in minutes! Set includes one sensor & one receiver. Expandable up to 16 sensors and unlimited receivers for complete coverage of your perimeter. Over 30 chimes to choose from. Match different chimes with different sensors around your property to differentiate where motion is being detected. LOUD & adjustable volume.


Two years of testing went into developing a reliable motion detector that will dependably alert you to motion around your property. Tested through thick forestry, hail storms, gusty winds, heavy rains, scorching heat, and snow. Minimal false alarms.


1/4 mile range has been tested in real world settings with trees, buildings, walls, and vehicles in order to make true and realistic wireless range claims (extra heavy interference such as thick walls, metal siding, tall hills, and many trees will diminish the wireless range.)


Guardline Security is a Seattle-based small business that has been selling outdoor motion alerts since 2001. We’re passionate guys who put many years into developing quality motion alerts we can really stand behind. We offer reliable expertise and after-sale support because we genuinely care about your positive experience.

  • Sensor Type: Passive Infrared (picks up heat movement).
  • Sensor Range: Sensor detection up to 40 ft.
  • Sensor to Receiver Range: Maximum 1/4 Mile
  • Zones: Program up to 4 different zones; allows you to distinguish which sensor was triggered and prevent interference. Supports 4 sensors on each zone.
  • Tones: 30 different tones and adjustable LOUD volume.
  • Lights: Flashing number for each zone and low battery lights.
  • Weather: Operating temperature range: -4 degrees to 140 degrees F. Sensors are weatherproof and include a hood for further protection against the elements.
  • Mounting: Sensor can mount to posts, walls, fences, and trees with included mounting hardware. Receiver sits on countertop.
  • Expandability: Can support up to 16 sensors and unlimited receivers in one system. Place different receivers throughout your home.
  • Frequency: 902.25-906.75 MHz.
  • Field of vision of the sensor: 9 to 12 degree viewing radius, up to 40 ft. distance.
  • Relay: Has powered 12 volt relay.
  • Warranty: Two-year warranty and technical support.
  • Power: Sensor 4 AA batteries; Receiver 12V adapter or 4 AAA batteries (receiver batteries are backup only). Has a power-saving mode, which makes sensor-only sensitive in low lighting.
  • Dimensions: Sensor (with shield) 3.25" x 5.5" x 4". Receiver 5.5" x 5.5" x 4".
  • Includes: 1 sensor, 1 receiver, 1 12V AC adapter, 1 sun shield, mounting hardware.

Customer Reviews

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Steven T. Verified Buyer
United States

Great product!

The Guardline arrived in a timely fashion. It was really easy to set up and get working. It is very effective at alerting of cars and people approaching the home. I am very pleased with this alert system and would definitely recommend your company and product to family and friends. Great product!

james r. Verified Buyer
United States

1/4 mile sensor.

Just got it installed today. Have another one that is doing great after I finally got it set up correctly.

Judy S. Verified Buyer
United States

Great for added security and peace of mind.

Very happy with Guardline and their products. The antenna works through dense forest. Alarm sounds can be chosen and are pleasant. We bought two antennas because deer, dogs can set off one alarm, but reliably only people or cars coming down driveway set off both alarms. Best driveway monitor system available. Customer service is also excellent.

Rich M Verified Buyer

As Advertised So Far

My application is a sensor located on my driveway entrance about 650-700 feet from the base station in the house. I don't have a clear line-of-sight from the sensor to the receiver base. The sensor signal has to go around a bend and through a moderate amount of trees. The base station is located about 80 feet higher in elevation than the sensor. I have a second sensor, but have not used that one yet. What I like: -Fairly easy set-up. -I thought the fact that they gave me a screwdriver was a waste, but it turned out that it was convenient since the sensor screws are so deep and small. They are easy to loose or strip. So the provided screwdriver was helpful since it worked perfectly with the sensor. -The base station comes with a battery back-up. This is designed to help when you loose power at the house. However, it's especially helpful when you are setting up the sensors. You can take the base station with you out to the sensor locations and test them with the base station right there since it has battery back-up. This makes set-up real easy and the instruction manual should actually be updated to make this recommendation for set-up. -Adjustable range and adjustable sensor field-of-view -More detection range than advertised. The specs are for about 40-foot detection. I'm getting 60 feet sometimes. -Many detection tones to use. -Pairs with multiple sensors -I'm getting consistent detections. -Works for me as advertised. A few minor things that could be improved: -One of the nicest features that I liked ended up being the most frustrating. The base station has a pause mode. This was perfect for me since I leave at 5:00 a.m. so I can hit the pause mode and won't wake my wife up. Or so I thought. After the 30 minutes is up it comes out of pause mode by ringing an announcement that it came out of pause mode. Totally defeats the purpose of pause mode. I just wake my wife up 30 minutes later, that's all. -I wish that both the base receiver and sensors took the same batteries. Minor complaint, but I have to keep AAA and AA on hand for the system. -Kit should have come with a few extra sensor screws. If the company is willing to include a screwdriver they should also put in a few extra sensor plate screws. The sensor screws are so small (user manual even warns of this) that they are very easy to loose. It's best to bring a small bowl or tub/bucket with you to place the screws in when changing the sensor batteries in the field.

James W. Verified Buyer
United States


Great, like the option of being able to add accessories / extra zones.

Q: Looking at the 1/4 mile unit for my in-laws. They live in W NC. The driveway is up a gentle 15-20 degree slope with many trees on both sides of the road. How will the unit work with multiple sensors? Biggest concern would be the one at the bottom of the driveway as there are two 90 degree turns prior to getting to the main county road.
Answers (1)
A: Hi Mark, if your distance between sensor and receiver is under 1/4 mile, then this unit would be great for this because it has a stronger signal that allows it to fight through interference such as the hill and trees. Just remember, as you introduce more interference, your effective range will diminish little by little. Take care!
Q: Some of the pictures, of the sensor, have a shield on the top and some don't. Does the sensor unit come with this protective shield?
Answers (1)
A: The sensor comes with the sun shield bot both the 500 ft, and the 1/4 mile version.
Q: Can the sensor be mounted on a metal pole/pipe without any interference?
Answers (1)
A: We recommend not mounting on metal surfaces because they cause a great deal of interference with the sensor's signal. You can try it in the location. but if it does not work, the metal interference is most likely why.
Q: Will the wireless waves from the camera to the monitor be blocked by trees and hills?
Answers (1)
A: They will not be entirely blocked, but solid objects do degrade the signal strength. Basically, the system has a maximum range, and solid objects will make that range smaller. Certain items such as metal and stucco cause much more trouble that wood or drywall.
Q: Can external devices be activated when motion is detected? For example, could it turn on an external floodlight or alarm that has its own power source? Thanks
Answers (1)
A: The GL5000's receiver has a set of wet contacts (12 volt) and a set of dry contacts. The wet contact only activates for a brief moment though, while the dry contact activates a device with its own power source.

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