Best Personal Locator Beacons and Satellite Messengers 2025

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Personal Locator Beacon and Satellite Messenger Devices

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This is a gear review about the Best Personal Locator Beacons and Satellite Messengers 2025.

No serious backcountry explorer should be without some form of personal locator beacon. These small and simple items are used to send out a distress signal when you’re in need of rescuing. A good quality hiking first aid kit can only do so much, you may need to be rescued.

Although we all may hope never to use one, they should still form a vital part of the emergency gear for any outdoor person.

To make your decision easier, I’ve rounded up some of the Best Personal Locator Beacons (PLBs) and Best Two-Way Satellite Messengers on the market. 


How We Tested

All the PLBs and Satellite Messengers in this review have been extensively evaluated and researched by the expert author who has many years of experience in Thru-Hiking, Backpacking, and Hiking. Many years ago the author was trained in Search and Rescue during his time as a Police Officer working in remote areas. He has been involved in many search and rescues during that time. The research and experience of the author have combined to come up with this review of the Best PLBs and Satellite Messengers for 2025. Read the Review Policy for further details.

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Best Personal Locator Beacons 2025

What are the Best Personal Locator Beacons (PLB] in 2025 are:

Best PLB Beacon for Backpacking

Ocean Signal RescueMe PLB1

Ocean Signal RescueMe PLB1

Weight: 4 oz / 116 grams
Pros:

> Small and Lightweight
> Ease of use
> 7-year battery life
> Reasonable Price
Cons:
> No two-way messaging, you can only send out a rescue signal.

If you’re after a no-frills personal locator beacon then the RescueMe gets the job done. This small device is purchased for a one-time price and comes with a very long battery life of 7-years.

Should you need an emergency rescue, it can be operated with a single hand to send an alert to the dedicated search and rescue satellite network.

The RescueMe personal locator beacon offers no two-way communication and simply sends out a distress signal with no further information.

This device is reliable but minimal. The satellite coverage is excellent but with no other forms of communication, there are definite limitations. If you want simple, then this is the Personal Locating Beacon for you.

The one-time purchase price makes it cheaper than many other devices.

If you are looking for something simple, reasonably priced, easy to use, and reliable then this is the best personal locator beacon for backpacking to get right now.

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ACR ResQLink PLB

ACR ResQLink PLB

Weight: 5.3 oz / 148 grams
Pros:

> Price
> Floats in water
> Ease of use
Cons:
> No two-way messaging
> This is larger and bulkier than some other PLBs.

The ResQLink View is another basic device, designed to send out a signal in the most distressing of circumstances. 

There are three levels of signal technology integrated into the ResQLink View – GPS Positioning, a 406MHz signal, and 121.5HMz Homing Capabilities.

Once your signal has been sent out, this powerful technology will quickly and accurately relay your information to a worldwide search and rescue network.

There are a few other features of the ResQLink that make it a desirable choice. There’s a built-in buoyancy for water use.

A range of attachment clips, including a belt clip and an oral inflation tube clip, give it increased wearability for varying activities. And the built-in Infrared and bright LED strobe lights to ensure extra visibility for nighttime rescues.

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ACR ResQLink 400 PLB

ACR ResQLink 400 PLB

Weight: 5.28oz / 150g
Pros:

> Ease of use
> Infrared and bright LED strobe lights
> Price – No subscription costs, and a cheaper device all around.
Cons:
> Basic – This is an incredibly basic device, with no two-way communication and limited features.

The ACR PLB is a basic unit that’s linked to a trusted network of search and rescue with proven results, then the ResQLink 400 is a decent purchase. 

With an intuitive button system, a built-in infrared and bright LED strobe light, and compact size, the ACR ResQLink 400 will slide easily into anyone’s emergency kit.

It may not have the features of some higher-end devices, but it will send out an emergency beacon.

It can be frustrating to purchase PLBs because it’s an expensive item that you don’t want to use. A ResQLink 400 will give peace of mind without the high prices of some other options. A good option for a basic hiking beacon.

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Best Satellite Messenger 2025

The Best Satellite Messengers 2025 are:

Best 2 Way Satellite Messenger

Garmin InReach Mini 2

Garmin Inreach mini 2 handheld GPS messenger

Weight: 3.5 oz / 100 grams
Pros:

> Ultra lightweight
> Very Good battery life
> Small size
> 2-way communications
Cons:
> Small Screen
> Need a subscription to use the features
> The 2 way communications are not as easy as Zoleo or ACR.

The Garmin InReach 2 is an improvement from the popular Garmin InReach mini. This new model has a digital compass and a trackback feature so you can follow your own tracks if you get lost. But most impressive is the increased battery life.

The Garmin InReach 2 requires a subscription service to operate all its features. These cost between $14.99 and $54.99. Via the subscription service you can use the live tracking, send location to others, receive local weather updates, send and receive SMS messages, and of course, have access to the PLB emergency rescue feature.

Overall, if you are looking for a device that tracks your location, can contact emergency services for rescue, and has two-way satellite communication, then the Garmin InReach 2 is the best 2-way satellite communication device on the market.

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Best Satellite Communicator for Smartphone

Zoleo Satellite Communicator

Zoleo Satellite Communicator

Weight: 5.3 oz / 150 grams
Pros:

> Still works if your Smartphone has no battery or is broken
> Compact and Lightweight
> Preset ‘I’m OK’ message
Cons:
> If your smartphone breaks, Zoleo loses much of its originality but still works.

Zoleo may not have been around as long as Garmin but they have a much better user interface than Garmin. Their two-way messaging system works across cellular, wifi, and satellite signals, for uninterrupted communication. That feature alone makes it a winner.

Subscription plans cost between $20 and $59 per month. With messages, weather, incoming and outgoing SMS, and more all on your own dedicated phone number. The lower-level plan has good functionality and is suited to those who don’t use this device often. If you want to use this device a lot, this is one of the best devices and subscription services.

The downside is that without the smartphone, Zoleo has limited functionality. The SOS signal still works, but only a basic preset ‘I’m OK’ message can be sent. So when using this device, be sure to carry a backup battery bank.

Overall, the Zoleo has a good user interface and is a solid option for someone wanting to use the best 2-way satellite messenger communication device. All this at a good price.

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More Satellite Messenger for Backpacking

ACR Bivy Stick

ACR Bivy Stick

Weight: 3.5 oz / 100 grams
Pros:

> Best suited for people who want to send lots of messages per day
> Lightweight and compact
> Dedicated phone number
> SOS can be activated on the device without the need to connect the phone
Cons:
> The lowest-level subscription plan is limited not the best value

The ACR Bivy Stick is another compact Satellite Messenger that pairs with your phone. It gives you a dedicated phone number to use with the device and has a decent smartphone app with access to many features.

Via the subscription service you can use live tracking, send location to others, receive local weather updates, send and receive SMS messages, and of course, have access to the PLB emergency rescue feature. Subscription costs vary from $14.99 per month to $59.99 per month. It should be noted that the subscription model on the lower plans is almost useless for anything other than a day trip per month. The high-end subscription model is great for heavy users.

Overall, the ACR Bivy Stick is a very good option for someone who wants to use this device a lot and is prepared to pay the higher monthly subscription costs.

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Spot X

Spot X Satellite messenger

Weight: 7oz / 198g
Pros:

> Qwerty Keyboard
> Smartphone Integration
> Longer battery life than some similar devices.
Cons:
> Bulky

For people who like to go minimal in their packing, the large Spot X may seem like an odd choice. However, the Spot can be used similarly to a smartphone, meaning only one device is necessary.

The integrated Qwerty keyboard makes the two-way messaging system of the Spot X easier to use than that of the Garmin.

It comes with its own number as well, so people can contact you easier without an already open line of communication. It also has share features and a compass, alongside the standard SOS.

There have been a couple of incidents when the Spot did not make contact with satellites, including with a hiking buddy of mine.

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Spot 4 Satellite GPS Messenger

Spot Gen 4

Weight: 5oz / 141g
Pros:

> Lithium batteries make for a quick change in difficult circumstances.
> Ease of use
> Reasonably Priced
Cons:
> No two-way messaging – The device only sends messages, it doesn’t receive them.

The Spot Gen 4 is the long-awaited replacement for the aging SPot Gen 3. And like the previous model, you can save some serious money with this unit which is around half the price of the best in-class Garmin InReach Mini 2.

Like many of the other Satellite Communication Devices, if things go bad on the trail, simply press the SOS button and help will be summoned. And when things are going fine and you settle into camp at night, you can send your location and a pre-programmed message to 10 of your family and friends. Just be aware that there is no 2 way messaging that allows you to receive messages from your contacts.

This is all supported by AAA batteries, which are easier to change in an emergency when compared to other charging methods. These batteries will last around 1250 check-in messages and much less when using the tracking features.

There have been a couple of incidents when the Spot did not make contact with the Globalstar satellite network, including with a hiking buddy of mine on the Appalachian Trail and in the far north of Alaska.

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PLB and Satellite Communicator Comparison Chart

BrandTypeWeightBattery Life2-Way CommunicationsWaterproof
Ocean Signal RescueMe PLB1PLB4 oz7 yearsNoYes – 15m
ACR ResQLink PLBPLB5.3 oz5 yearsNoYes – 10m
ACR ResQLink 400 PLBPLB5.28 oz5 yearsNoYes – 10m
Garmin InReach Mini 2PLB, 2-Way Messaging3.5 ozup to 30 daysYesYes – 3m
Zoleo Satellite CommunicatorPLB, 2-Way Messaging5.3 ozup to 200 hoursYesYes – 2m
ACR Bivy StickPLB, 2-Way Messaging3.5 ozup to 120 hoursYesYes – 1 m
Spot XPLB, 2-Way Messaging7 ozup to 240 hoursYesYes – 1m
Spot 4 Satellite GPS MessengerPLB, 2-Way Messaging5 ozup to 52 daysYesYes – 1m
Source: Manufacturers


Emergency SOS messaging

Emergency messaging is the primary function of any PLB or satellite messenger. The device needs to send out a signal that communicates both where you are, and that you’re in danger, and it does so via satellite.

Then Search and Rescue (SAR) can come and find you.

The most basic devices will only communicate that you’re in danger. These are generall called a Personal Locator Beacon or PLB. More sophisticated devices such as 2-Way Satellite Messengers can be used to communicate in greater detail, so the SAR can respond, or loved ones can know your location.

All PLB and satellite messengers should be equipped with SOS emergency messaging.


Non-emergency messaging

Non-emergency messaging allows a person to communicate more with friends and family.

A basic device will be able to send out preset messages of reassurance. Other devices can be used similarly to SMS cell phone messages, only signaling via satellite rather than cell towers.

Some devices also include tracking, which will regularly update a chosen correspondent with your location. These services require a paid subscription with the manufacturer. Costs vary anywhere from $14.99 per month to $59 per month or even more for professional subscriptions.

Non-emergency messaging is less important than emergency messaging and more expensive. However, it does greatly improve communication. Another advantage of a two-way system is it allows you to cancel an SOS message should it be sent in error.


Signal

The functionality of any of these devices relies on satellite systems. This is a generally reliable form of communication, but there are flaws. To send a satellite signal the sky must be visible, and a multitude of other factors can cause errors.

A message will only be sent when a satellite is in range, which means there may be times when coverage isn’t possible.

One of the advantages of a two-way messaging system is it allows you to check your signal.  

It’s impossible to check your signal before you go as it depends on so many varying factors. However, each device uses a specific satellite network.

COSPAS/SARSAT, Iridium, GOES, and GlobalStar is all networks with a history of service and a proven record. 


Ease of use

Ideally, an SOS beacon will never need to be sent at all. When they are needed, the situation is often stressful and fraught with danger. An SOS button needs to be easy and intuitive to use. All the devices in this review have simple SOS buttons that are easy to use.

Other features, such as non-emergency communication, maps, and smartphone apps may be more complicated and will need some time to learn the process.

All these devices are small, so functionality does suffer. Those linked to Smartphones have added functions that stand-alone personal locator beacons do not have.


Size and weight

Portability is an important feature of a PLB or a satellite messenger. They need to be on hand at all times and shouldn’t weigh too much.

The majority of the devices in this list are small and lightweight.


Price 

There are two price points to consider when purchasing a PLB or satellite messenger. First is the upfront cost, and second is the subscription plan. The initial upfront cost of these devices can be expensive.

For a PLB, it is a one-time expense. There are no subscriptions needed. The only cost will come after 5-7 years when the batteries need to be professionally replaced by the manufacturer.

Systems with two-way messaging will require a subscription fee. In some cases, this is quite expensive.

However, it does allow for greater communication. Always consider both prices before making your purchase.


Battery

Battery life is super important when it comes to devices like personal locator beacons and satellite messengers. Most of the batteries on Messenger GPS units need to be recharged on a regular basis. When out backpacking this can easily be done by taking a Lightweight Powerbank for Backpacking or a Portable Solar Charger for Backpacking. Both these options are lightweight and provide enough power to charge these devices.

Dedicated PLBs have a built-in battery and a test function to ensure the battery is OK. This should be checked regularly. Contact the manufacturer when the battery needs to be checked or replaced.


Conclusion

Here are the Best PLBs for 2025:

Here are the best satellite communicators for 2025:

Another one of the Best GPS & Electronics Gear Reviews from BikeHikeSafari.

Frequently Asked Questions

Do I need to register a personal locator beacon?

Yes, most personal locator beacons require registration with the NOAA (National Ocean and Atmospheric Administrator). This is generally a free service and must be done before you take your PLB anywhere.
Each country has its own registration system and when traveling between countries the PLB must be registered in that country.
Registration can be done online and must be updated every two years. You should also update your registration whenever your information changes.

Do I need a personal locator beacon?

A personal locator beacon is an essential part of the emergency kit for most people who enjoy exploring the backcountry. If you regularly venture into areas that are away from other people, a PLB could save your life.
If you spend time on difficult or tricky terrain, then a PLB is a valuable resource. Especially if you enjoy exploring alone, then a satellite messenger allows you to maintain contact throughout a trip.

Should I buy a personal locator beacon or a satellite messenger?

A satellite messenger has more options, whereas a PLB is often cheaper. Which you buy will be a choice determined by where you like to travel, how often you travel, and how much communication you desire.
The advantage of a satellite messenger is that they allow for two-way communication, so you are more connected with the outside world. A PLB can only be used for SOS emergencies, but there are no subscription fees required.
A PLB has a battery that can last for years and a Satellite Messenger has a battery that will last a week or more. The Satellite Messenger battery can be recharged in the field via a USB and external battery such as an Anker battery. A battery on a PLB must be sent to the manufacturer to be replaced after a couple of years.

What is a Satellite Messenger?

A satellite messenger or satellite communicator is a device that allows you to make 2-way communications via satellite. So when there is no cell phone signal you can still make communications. They can also be used for rescue to allow search and rescue to locate you in an emergency.

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PLB Story

The weather was miserable when the helicopter arrived due to the Personal Locator Beacon being set off.

It had been raining all day and the wind was seriously strong. I was hiking in the backcountry of New Zealand, alone.

Cold and wet I arrived at a remote backcountry mountain hut. Before entering I observed a Personal Locator Beacon sitting outside with the antenna out and the light on. Something was wrong.

I entered the hut and found a hiker I had met multiple times clutching her shoulder. It was a simple dislocation. In the middle of nowhere, a simple dislocated shoulder means you cannot carry a backpack, you cannot use trekking poles, and cannot walk long distances on difficult terrain to rescue yourself.

In less than 2 hours a rescue helicopter arrived and landed outside the hut despite the challenging weather. The hiker was soon in hospital and made a quick and full recovery.

Had there not been a Personal Locator Beacon, also known as a PLB, or a Satellite Messenger then it would have been a different and difficult situation.

From this moment on, I decided that taking a PLB or Satellite Messenger into the backcountry is a great idea.

Best PLB and Satellite Communicator Device
Best PLBs and Satellite Messengers for Backpackers and Hikers

BikeHikeSafari Gear Review Process

The author, Brad McCartney from BikeHikeSafari is a small independent adventurer and outdoor gear tester who owns and runs BikeHikeSafari.com.

BikeHikeSafari is not part of a large blog network and is proudly independent. All reviews on this site are independent and honest gear reviews of outdoor products by the author.

The author, Brad McCartney is a very experienced triple crown thru-hiker, adventurer, and bike tourer having spent 1000s of nights sleeping in a tent and sleeping bag (Read more). He was a manager of an outdoor retail store and is very experienced in what is important when using and testing gear for reviews like this.

BikeHikeSafari will never receive any money for reviews and they do not accept sponsored reviews on this website. All the comments about the gear reviews are from the author based on his years of experience. Hope this independent review was helpful for you.

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About the Author:
Brad is an Australian who has completed the hiking Triple Crown after he hiked the Pacific Crest Trail, Continental Divide Trail and Appalachian Trail. He has hiked on every continent (except Antarctica) and has cycled from Alaska to Ecuador. He is an expert on outdoor gear currently living in Chile.

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