The High Tech Society

Best Personal Alarms (2020 Reviews)

February 4, 2020

Having a personal alarm always seemed like a great idea that just didn’t quite work as good as expected. They were never loud enough to be painful, and many would not even help to attract the attention of people a few hundred feet away before it was far too late to matter. In a parking lot with other noises around you, all the alarms did was make you feel better by clutching your electronic safety blanket while you were an easy target.

But that was in the past. Electronics have improved incredibly over the last 10 years, and there are some real contenders in personal security products now. We are going to list the top 5 best personal safety alarm products we would trust enough to give to our grandmothers. We were going to review 6 of the best personal alarms available anywhere, but we are way too picky at The High Tech Society and could not find a 6th one worthy of our list. We did find a lot of junk with an LED light, and lights don’t help in a bad situation.

Each personal alarm in our list has the loudest volume, longest life, and most painful frequency range of anything on the market.

BASU eAlarm+
  • 130 dB Pull-Pin Alarm
  • Waterproof
  • TSA Approved
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Vigilant 130dB
  • Push-Button Design
  • A Bit Sensitive
  • 130 dB
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  • Contacts Emergency Call Center
  • Sends Map & GPS Info to Contacts
  • Ripcord Activation
  • Silent Alarm
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5 Best Personal Alarms of 2020

Here are the top 5 personal alarms on the market in 2020. Everything that you need to know about each one is in the reviews below.

1. BASU eAlarm+

The eAlarm+ (aka Robocopp) came on the scene in 2016, making it fairly new, and made a huge splash with its innovative design. This personal alarm functions like a hand grenade. Keep it on your keychain, belt loop, bag, or purse strap, with your hand grasping it. Just pull the keyring to activate the personal alarm. When met with unexpected danger or a sudden attack, the natural human reaction is to jump. The brilliance of this product is how it exploits a natural reaction to sound a 130dB alarm so you do not have to think about turning it on or fumble for a switch.

As a bonus, it comes in a variety of colors.

BASU eAlarm Key Ring Personal Alarm
  • Great Keychain Design
  • Easy to Trigger SOS
  • Loud (120 to 130dB)
  • TSA Approved
  • Fits Anywhere
  • Batteries cannot be changed
  • Beware of fakes with this


The battery lasts about 5 years, so not being able to change it is not a huge problem when you consider that is the compromise for having a waterproof personal alarm. Watch out for fakes with these alarms, as some copycats are real junk.

The real BASU eAlarm+ is the best alarm you can buy in 2020.

2. Vigilant with Emergency Pull-Pin

This Vigilant 130db personal alarm uses AAA’s instead of the watch batteries typically used, and these are also easily replaceable. The result is a little more bulky device with a longer runtime and an emergency alarm that is one of the loudest ever tested.

With the extra power, it can also run a built-in LED flashlight, which is nice for those dark key-fumbling moments when you are trying to hurry to get out of a lonely pitch-black parking lot.

Like the Robocopp above, it uses a ripcord style alarm, which is our personal preference to carry, but this model also has a panic button for easy use.

Vigilant 130db Personal Alarm
  • Best Battery Life
  • 130db Alarm
  • Pulling Wrist Strap Activates
  • Personal Customer Support
  • Large Case Size
  • High Price for Poor Build Quality

3. Katana Safety Arc

Katana Personal Alarm

The Katana Safety Arc is the first truly new technology to hit the personal alarm market in years. And it’s a bit of a game changer.

When I hear the words personal safety alarm, I have a tendency to think of an elderly grandmother thinking that a loud sound is going to scare off a purse snatcher. Thankfully, this is very different.

The Katana Arc connects to the back of your smartphone (or cell phone case). It just sticks on with adhesive, no wires and no connectors. It’s not another device to keep up with, because it’s part of the device you always carry.

Alarm Activation

This alarm goes beyond making a loud noise and hoping that an annoying sound is enough to save your life.

When the alarm is used in an emergency, a 24/7 response center is contacted and your exact GPS coordinates are given to authorities.

The app can be configured to send an alert and a map of your location to 7 of your contacts. This is nice if your wife is out for a jog because you are the closest help that she will have.

A piercing 125 dB alarm can also be triggered if you choose to do so.

3 methods of use for whatever situation you find yourself in:
  • Lanyard around your wrist. Pull the cord and the alarm activates.
  • Traditional Push-Button Available.
  • A silent call button, which contacts a call center but makes no sound.


These alarms are more expensive than a simple noise maker, but that’s because noise makers can’t literally call for help automatically.

If you can afford it, this is the best product on the market but it is #3 on our list due to the cost.

4. Vigilant 130dB

This 130dB personal alarm keychain uses standard watch batteries to keep it small enough for your keychain but easy to grasp in an emergency. This is more of a time tested and classic product with upgraded and modern technology.

One of the worst complaints I saw with this device was where someone dropped it in a puddle in a parking lot and it went off and wouldn’t stop. They tried everything to stop it, including submerging it in water for 10 minutes, stomping on it, and even running it over with their car 8 times! Their complaint was they couldn’t make it stop or break it!

It is not sold as waterproof, but that’s pretty well built for an emergency situation!

Vigilant Personal Alarm Keychain
  • U.S. Based Company
  • Designed in the United States
  • Quick Battery Replacement
  • Very High Decibel
  • Sensitive Button
  • Must Use Small Clip
  • Not Pocket Safe

The push-button style will be preferred by some, especially since it has a more traditional shape that someone older may be more comfortable with. But, this means that it can be set off too easily as the button is easy to depress, so if you have it in your purse you could easily set it off accidentally. This was the biggest negative found in an otherwise well made and classic personal alarm.

5. Siren Song Alarm Keychain

This is by far the most ear-splitting, lowest priced, and highest-rated self-defense alarm available. It has some of the classic look of other popular models while keeping the pin method of activating. Because it uses a clip and lanyard cord, it can be easier to activate in an attack.

This personal security alarm is very loud and the sound will definitely draw attention.

I am VERY critical of low priced things made in China and expected to breeze past this. Instead, I found myself wondering why a 5-pack of these costs less than the Vigilant 130 dB personal alarm keychain in the review above, but they are louder and have comparable construction quality.

Siren Song 130db is the Best Personal Alarm in an Emergency
  • Loudest Safety Alarm (130DB)
  • Cheap But Effective
  • Comes With A Pull Pin
  • No Button to Press

In the end, if I was on a budget, this is what I would give to someone I cared about. It comes in a 5-pack and has a pull-pin, so carrying 2 and activating both devices simultaneously is easy (put two straps on your wrist) and will get more attention than anything else available.

Frequenty Asked Questions (FAQ)

What is the best alarm for self-defense?

The Katana Safety Arc has key advancements that help the product provide significantly better protection in case of attack. BASU offers the best traditionally designed product.

Are personal alarms effective?

Personal alarms are effective when used in the right situations. They are most effectively used in situations where an attacker is depending on not being noticed.

For example, activating an alarm in a busy parking lot may make a kidnapper turn and run, as the perpetrator would know that they will not succeed without having witnesses.

How much should I spend?

A safe personal alarm should cost under $30. Safer options, those that contact help automatically, are considerably more expensive.

The BASU eAlarm+ and Vigilant 130 dB Keychain Alarm are both reliable and safe.

What is a personal alarm?

Personal alarms are small electronic devices that emit a piercing sound when activated. Ideally, these should be small to easily fit in a pocket and strong to withstand accidental drops.

Some personal alarms also have the ability to use your cell phone to call for help.

What is a personal alarm system?

A personal alarm system is a multi-layered security system like the Katana Safety Arc.

It is comprised of a pull-pin trigger, which activates an alarm and contacts a remote call center for help. Optionally, it can also contact multiple friends or family with a map of your GPS coordinates.

How loud is 140 Decibels?

140 Decibels (dB) is roughly equivalent to the sound of a jet engine at takeoff. It should be noted that the type of sound makes as much difference in how it is heard as the volume. For example, an ambulance siren is approximately 120 Decibels but it is more piercing than a sound with more bass.

Humans are very sensitive to sounds in the 2 kHz to 4 kHz range.

Important Features

When buying a personal alarm, it’s easy to simply focus only on how loud it is. Everyone wants to have protection that will make an attacker’s ears bleed. That’s all fine and nice, but the items below can be even more important to consider than the decibel level.


Good safety alarms need to be durable enough to withstand numerous the bumps of normal life and smacking against the keys in your pocket. Ideally, it should be able to withstand a drop on concrete. It will eventually get dropped and you need to still have confidence in it protecting you when you pick it up.

Activation System

Perhaps the most important part of any personal self-defense item is how convenient it is to use. You will want something compact and portable, whether you are putting it with your keys or it will be attached to a backpack.

When walking to your car, pulling the pin out needs to be a reflex action. If you have to fumble with it to turn it on, it could be worse than having nothing by making an attacker mad rather than surprised.

The ideal device is easy and intuitive for you to activate, but not easy to set off by accident.


Going for a cute design is the easiest mistake to make when buying safety alarms. Too often, women opt for cute alarms or a parent gets something that looks like their kids would choose.

Remember that your self defense isn’t about fashion, it’s about your personal security and protection. Nothing else matters!

Don’t worry with trying to disguise your personal alarm like it’s a decorative charm or teddy bear. A personal alarm is not a gun. No one is going to fear it if they see it hanging off of a purse. Buy something substantial and with some kick to it to take someone off their guard.


While some devices are rechargeable, many use AAA or watch batteries and a couple of models can not be charged or changed.

Personally, I prefer a model that is changeable. Maximum voltage output is always higher than the rechargeable options, and it just takes a couple of minutes for your device to be back to full power.


You may see personal alarms that have a backup whistle, built-in flashlight, or other extra features. Avoid these alarms, as these features drain the battery with every use and rarely provide real value. You are better off carrying a little flashlight if you need a flashlight and keep your personal alarm charged and ready to go.

You need to feel comfortable that the alarm will get attention from anyone around and give you time to get away. However, the most effective defense and way to ensure your safety is to pay attention to your surroundings, especially at night.