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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 10 left in stock, order soon!
Arrives
Saturday, Nov 14
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At a glance
- Condition
- New
- Color
- Green
- Model
- RA11
- Dimensions
- 2.76"L x 0.87"W x 4.33"H
- Weight
- 9.44 oz
- Power Source
- Battery Powered
- Battery Description
- Lithium-Ion Polymer
Features 7
- Precise Radar Detection A Reliable Camping CompanionUnlike traditional PIR motion sensors that rely on heat and struggle in harsh conditions, Letwesaf radar motion alarm system uses advanced 24GHz millimeter-wave radar to detect real movement. Smart filtering reduces false alerts from wind, sunlight, leaves, or brush. This camping alarm can detect motion through tent, bushes, and light obstacles with consistent accuracy, helping reveal hidden threats even in total darkness for dependable outdoor security.
- 1/2 Mile Wireless Transmission Range React Before Danger ArrivesThe receiver picks up alerts from the detector at up to 0.5 mile (800m) awayabout 7 football fieldsgiving you enough time to react, retreat, or prepare. This long-range wireless signal keeps you informed and aware of approaching people, vehicles, or wildlifeideal for camping, overlanding, property monitoring, hunting, or driveway alarm use.
- Customizable Detection Zone Precise Coverage for Critical AreasCreates a 3D rectangular detection area, not just a simple straight line. Starting at 1720 ft and expandable up to 5020 ft, with motion tracking up to 75 mph, allowing flexible coverage for campsites, RVs, or properties such as farm, home, front porch, and garage. Accurately detects intruders, wildlife or vehicles, early for better response and full perimeter protection.
- No Wi-Fi Needed Security Alarm Portable, Rechargeable & Easy SetupWorks completely offlineno WiFi, no setup stress. This pocket-sized security alarm is an entirely independent system, easy to carry and providing reliable protection anywhere. The built-in 3000mAh battery provides up to 48 hours (6 nights) of protection(supports solar panel charging for extended runtime). Quick setup with a ball mount or rope on walls, fences, trees, or any other surface.
- Full Weatherproof Built for Harsh Outdoor ConditionsDesigned to withstand harsh outdoor conditions, Letwesaf meets IP66 waterproof and dustproof standards. Performs reliably in rain, fog, snow, dust, and wildlife activity such as bears and coyoteseven in extreme temperatures. Ideal for camping, backpacking, hunting, fishing, RV use, farms, remote cabins or outdoor property protection.
- Expandable System Up to 6 Sensors, Full 360 CoverageConnect up to 6 sensors (need to purchase separately) to one receiver to create a full 360 perimeter security system. Ideal for larger areas like campsites, farms, driveways, home yard or rural properties. Expand coverage as needed to eliminate blind spots and stay fully aware of movement around your property at all times.
- Quick Start TipsFor the best experience, fully charge the device before first use. To help you operate it with ease and confidence, we've carefully updated the user manual. Please download the latest manual at the bottom of the page.
Description
Reliable Camping Companion — Weatherproof, sees through non-metallic materials, and delivers more accurate alarms Portable Off-Grid Design & Easy Setup — Lightweight, no WiFi needed, and can be mounted on any surface The Brand You Can Trust — Recommended by 10,000+ users Radar Alarm System-Green Detector Only-Green Radar System-Desert Camo Radar System-WoodlandCamo Solar Panel Charger Only
Specs 23
| Color | Green |
|---|---|
| Brand | LETWESAF |
| Power Source | Battery Powered |
| Product Dimensions | 2.76"L x 0.87"W x 4.33"H |
| Battery Description | Lithium-Ion Polymer |
| Number of Batteries | 1 9V batteries required. (included) |
| Voltage | 3.7 volts |
| Control Method | Push Button |
| Mounting Type | Wall Mount |
| Maximum Range | 15 meters |
| Sensor Technology | Radar |
| Wattage | 11.2 watt-hours |
| Item Dimensions L x W x H | 2.76"L x 0.87"W x 4.33"H |
| Shape | Rectangular |
| Item Highlight | 24GHz mmWave Radar, 1/2 Mile Range, Weatherproof Wireless Rechargeable Motion Detector Sensor for Outdoor Camping RV Property |
| UPC | 717504807829 |
| Item Weight | 9.44 ounces |
| Model Name | RA11 |
| Manufacturer | LETWESAF |
| Number of Items | 1 |
| Built-In Media | 1x Detector, 1x Install Bracket, 1x Receiver |
| Model Number | RA11 |
| Mfr Part Number | HLIGM1G |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Nov 14
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Very effective radar based sensor system
Color: Woodland Camo
Excellent product and absolutely does what it says it does in terms of being an effective radar based sensor. Also great quality, clear instructions and an excellent brand and company that really cares about what they’re doing and why it matters. Very accessible and good customer service too.
Reviewed in the United States on August 29, 2026 by Daniel C. Moyers
Works well so far with solar. Heavy rain an issue
Color: Green
Detector to receiver range is pretty good. A few hundred feet for sure, but no idea if 1/2 mile is feasible unless it is across an open field. The detector works fine using a solar panel to keep it charged and running 24/7. It has worked that way for over a week so far. Time will tell how well it does in extended periods of cloud or when temperatures drop. Lots of false positives with birds it seems. Heavy rain will trigger it constantly, but that is under extreme conditions. We will see how it does over the coming months. Seems expensive, but for what it is the price is probably OK. Maybe cost will drop if this becomes popular and there is economy of scale.
...
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Reviewed in the United States on September 5, 2026 by Gregory L. Brown
Its cool
Color: Green
It’s radar that works with or without line of sight. I have had no problems with false triggers the noise from the unit could have came with a volume adjustment but you can mute it and just watch the channel or receiver illuminate during movement.
Reviewed in the United States on August 6, 2026 by Greg
Camping use
Color: Green
Excellently manufactured! Works great no issues!
Reviewed in the United States on September 4, 2026 by Christopher Trajno
Works well
Color: Woodland Camo
Little pricy for what you get but works well
Reviewed in the United States on August 4, 2026 by Dooug Buhman
Easy Set Up and Easy to Monitor.
Color: Green
I was looking for a camp security system that was easy to set up and gave me an audible alarm. This was it. I purchased another detector and was able to figure out how to set it up and set the parameters so it would go off when someone or something entered my camp. I have had nothing set it off except a small rabbit. But I’m sure I’ll get to have someone trying to check out my gear next year.
...
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Reviewed in the United States on November 4, 2025 by Lance
Before & After
Color: Green
Last winter we had an animal destroy all the seats on our Bennington Pontoon I/O boat. It was very, very expensive to get all the seats recovered. This year we have two sensors on our boat to detect any movement/animals. We had to run power to keep the sensors on 24/7. So far very pleased. JG Whited Athens, AL
...
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Reviewed in the United States on December 5, 2025 by Glenn
This is good for security
Color: Green
This item works as advertised
Reviewed in the United States on July 12, 2026 by P. Wells