Do you fear aggressive dogs? Many people love dogs, and the relationship has grown to be stronger than before. Illness and poor home care are among the factors that make a dog more aggressive. Some dog breeds are naturally born aggressive.

You are not 100 percent safe when you meet such dogs, even if they are on a leash. The strongest ultrasonic dog repellent is a handy tool you need to have, even if you are not a dog owner.

It helps dog trainers manage destructive behaviors like pulling, barking, and chewing. The handy little tool is humane, safe, and effective in trapping a dog’s attention.

It will protect you from a dog bite in case you meet a stray aggressive dog. Whether you own a dog or not, the device is an excellent thing to have. Let’s look at the highest rating strongest ultrasonic dog repellers in the market.

Best Ultrasonic Dog Deterrent - A Quick View


MODUS Bark Control Device

ultrasonic dog repellents


FIRST ALERT Bark Control Device

FIRST ALERT Bark Genie Handheld Bark Control

The 7 Ultrasonic Dog Repellers

1. MODUS Ultrasonic Dog Barking Deterrent, Training & Control Device

ultrasonic dog deterrant

It’s a safe and effective device for bark control and dog training. It can train your dog to abandon behaviors like digging, barking, chewing, and fighting. The device is suitable for all dog breed sizes.

Human beings have a hearing range about 20khz, while dogs can hear a range of 15HZ to 120 kHz. The tool emits an ultrasonic sound of 25KHZ. The sound produced can’t affect human beings, but it will grab the dog’s attention.

The device is convenient for outdoor use. Its small size fits well in human hands and has an adjustable anti-static wrist strap. It has a 16.4 feet control range that will work well on small and big dogs whether they are aggressive or not.

It’s effortless to use the device. You only press and hold the button for the device to release the ultrasonic sound audible to dogs only. There is a LED indicator that turns on when you press the ultrasound button.

The tool turns off automatically when you press the button for more than ten seconds. MODUS Ultrasonic device uses four AAA batteries that are part of the order you make.

The ultrasonic sound emitted isn’t effective on dogs with hearing problems. Such dogs and other dogs below six months or above eight years shouldn’t use the device.


  • It’s excellent for your money.
  • Works on all dog breeds.
  • Portable and easy to use.


  • Customer support is a bit low.
  • Its small size makes it prone to misplacement or getting lost.

2. MODUS Bark Control Device – Anti Barking Device

ultrasonic dog repellents

It provides an effective and safe solution to bark control and dog training. It trains your dog to stop unwanted behaviors like digging, barking, and fighting. The tool is safe for all dog sizes, and it emits an ultrasonic sound of 25KHZ audible to dogs alone and not human beings.

The device works within a range of 16.4 feet which is above the usual 6 feet range. The design is portable for indoor and outdoor use. You don’t need skills to operate the machine as it involves only pressing the button.

The handy tool has an adjustable anti-static wrist strap. It has replaceable four AAA batteries. The LED light on top indicates the low power and working status modes.

The machine is effective on dogs between six months and eight years. Provide companionship and close observation at the start of the training. If you won’t, then don’t expect to achieve excellent results.


  • It’s effective on all dog breeds.
  • Portable and easy to use.


  • The small size makes it easy to get misplaced.

3. PetSafe Indoor Ultrasonic Dog Bark Control

dog dazer ii ultrasonic dog deterrent

This tool with high frequency sound can be used on all dogs of different sizes. It controls the excessive barking in dogs within its range of 25 feet. The device works well on dogs aged six months and above.

The versatility of the tool makes it able to be handheld or free-standing while in use. The microphone detects the dog’s barks to overcome false corrections. PetSafe Indoor Ultrasonic Bark Control tool has two settings.

It can automatically emit the sound when you set it. You can also press the manual button to tame the dog’s inappropriate behavior. There is no bark guarantee as some specific dogs might not respond to the ultrasonic sound.

In case the device fails to meet your needs, please get in touch with the PetSafe brand. The average battery life of this device is between five to six months.

It can take a nine-volt battery which isn’t included that lasts for six months depending on its use. When you buy the tool from an authorized dealer, you stand a chance to get a manufacturer’s warranty.


  • It’s portable and easy to use.
  • You can carry it around or place it somewhere specific.
  • It has two settings for manual or automatic use.


  • Not effective on some dogs.

4. STUNICK Handheld Anti Barking Ultrasonic Dog Bark Deterrent

ultrasonic dog bark deterrent

Train your dog safely with this device. It will control lousy behavior of unnecessary barking and aggressiveness, among others. It’s effective on dogs aged six months and above. A regular dog training clicker will train positive behaviors.

The STUNICK bark training device reduces all negative behaviors. It gives excellent results in your puppy training. When a dog displays lousy behavior, press the device button to emit the ultrasonic sound.

The sound will irritate the dog. The noise will make dogs stop barking or continuing with bad behavior. You won’t hear the sound produced, so you are safe. Repeat the process for three to ten days to give a conditioning reflex to learn the new habit.

The effective range of the device is up to 20 feet. When a dog responds positively, please give it a treat or praise it for boosting the learning process. The STUNICK tool doesn’t work on dogs with hearing problems or deaf ones.

Don’t use the device as a security tool against stray or aggressive dogs. Don’t use the bright flashlight and a sonic anti-barking deterrent on untrained dogs. You may not know if the stray dog is a conditioned or trained one. You may also not know how tough it is when it meets new faces.

The device has a watertight Abs casing making it usable even in rainy seasons. It uses one 9V battery, which is not included in the order you make. The device has 30-day warranty money back if it becomes ineffective to your pet. It also has a 12-month manufacturing warranty.


  • It has a LED flashlight.
  • It’s a long-range tool.
  • It has a user-friendly design.


  • It might not work on aggressive dog breeds.

5. Dog Dazer II Ultrasonic Dog Deterrent

loudest ultrasonic dog deterrent

Do you want a device that will work on cats 40 feet away and on dogs up to 20 feet away? It’s a top product enjoying a high number of positive rates.

The excellent handheld device uses modern ultrasonic technology to keep dogs at bay. It works well on aggressive and unfriendly dogs in your backyard and neighborhood.

The tool is vital for meter readers, joggers, walkers, rescue teams, and police. It’s lightweight and uses a 9V energizer battery.

It has a low battery indicator and a high impact plastic. Some online vendors offer the product at low prices, but you pay a shipping fee. Other vendors will ship the product free of charge.


  • Buttons are easy to press.
  • It has a low battery indicator.
  • Works well between five- and 15-feet range.
  • The design is user-friendly.


  • It has only one setting.
  • It doesn’t have a LED light.

6. FIRST ALERT Bark Genie Handheld Bark Control Device (FABCU2G)

FIRST ALERT Bark Genie Handheld Bark Control

Do you want a cheap product to train your dog against bad barking behavior? The FIRST ALERT Bark Control Device won’t disappoint you. It works to fulfill its promise even if it lacks some features compared to other devices.

The device is harmless to you and your pet, giving an effective solution to calm barking dogs. It produces a high-pitched sound only audible to dogs. The sound stops dogs from doing different destructive behaviors.

Activate the device when a dog displays lousy behavior like chewing and barking. Use the tool alongside verbal commands to stop the dog from anything wrong it’s doing.

Remember to praise or treat your pet well when it displays a positive reaction to the training. The device works on many breeds. It operates on four AAA batteries which aren’t included in the package when buying.


  • Easy to carry and use.
  • Works within a range of 15 feet.
  • It’s cheap.


  • Not effective on all breeds.

7. Brellavi Ultrasonic Anti-Bark Dog Training Equipment

aggressive dog repellent

It’s advanced dog training equipment for obedience. It helps train and end destructive behaviors like digging, biting, scratching, and barking. It emits a sound audible to dogs alone that range between 35-45HKZ.

The tool works in a range of up to 50 feet, making it able to deter aggressive and unfriendly dogs. It’s a portable, lightweight, and handy tool that emits sound safe for you and your pet. It won’t damage the auditory sensors or bring any form of damage.

The tool is all-purpose for travel and outdoor use by walkers, hikers, joggers, and cyclists. The device also improves the natural behaviors of a dog. It has a LED flashlight at the front. It can also aid in night walks and dark areas.


  • It has a LED light.
  • Applicable for night walks.
  • It has a wide range of work up to 50 feet.
  • Portable for travel and outdoor activities.


  • Prone to misplacements due to the small size.

How To Use An Ultrasonic Dog Repeller

The main aim of a dog repeller is to replace the traditional training methods. The tools target those dogs that have a nuisance barking habit. Dog repellers are effective in taming destructive behaviors like chewing, digging, and barking.

The practices are unmanageable using the traditional training methods. The tools are also practical if you have nippy or aggressive mutts in your region. You will be able to protect yourself.

Let’s look at the best ways to use these handheld tools.



Most of these gadgets have unique settings, so you must ensure you use the correct setting. Low settings are for behaviors like chewing and digging, among others. Higher settings target the barking behavior. It makes it possible for the dogs to hear the sound in their racket. They are also for aggressive dogs that are after you.

>In dire situations, use the high settings together with the LED light if the device has it.


The devices have different working ranges of approximately 20 feet. You need to be within six feet with your dog for barking, chewing, and digging habits. Hold the tool and point it directly to your pet with an extended arm.


Use the ultrasonic sound with commands. Use commands like quiet and stop to make the dog understand the order in the future. Use positive reinforcement like a treat or praise to make this training meaningful. Only use the device when there is a need because the sound they produce is irritating to your pet.

How To Buy The Best Ultrasonic Dog Repeller

With the many different products in the market, it becomes hard to select the best fit for your needs. It becomes worse when you are a first-time buyer, and you believe the higher the price, the better the product.

Let’s journey in this field of buying the best ultrasonic dog repeller.

Types Of Repeller:


Do you know which type you need?

  • Handheld Repellers: They are popular because they are cheap. They are also convenient to carry around. Most of them use a 9V battery or AA batteries.
  • Stationery Repellers: From their name, they get fixed in a place mostly outside homes. They use Passive Infrared (PIR) sensor in detecting movements in the area. They get triggered when animals pass a set limit range. They help to keep away rats, squirrels, cats, among others.

What Animals Get Repelled?

Ultrasonic repellers scare away other animals rather than dogs alone. With the varying frequencies, they keep away different kinds of critters. The frequency between 13.5 to 19.5 kHz will scare away mice, dogs, and foxes. 19.4 to 24.5 kHz frequency will scare away skunks, racons, and badgers.
When you have a garden or a lawn and want to keep these critters away, you need stationery repellers.

Effective Range

Knowing the effective range is vital in buying your tool. It prevents your repeller from failing to perform. Get a repeller that works within a specific range. Most devices will work within the scope of 5 to 20 feet, while others go up to 50 feet. It’s essential to understand the coverage area of your device.

LED Light

It’s an excellent feature on ultrasonic dog repellers. The light is enough on aggressive dogs that seem not to respond to the ultrasound alone. If you live in a backyard full of fierce dogs, you will need the loudest ultrasonic dog deterrent with LED light to aid in night walks. It will give bright light that will keep dogs away when combined with ultrasonic sound.

Battery Type

The type of battery an ultrasonic device uses affects its effectiveness. Most of these devices are using rechargeable batteries or AAA batteries. Some use solar power. You need to go for one that interests you.

Why Use Ultrasonic Dog Repellers At The Expense Of Other Methods?

If your main aim is to scare away dogs, then these devices are the best. They will do it humanely without leaving mental trauma or physical harm to your dog. You won’t have to throw stones or beat the dog away.

These devices are effective as they emit a high-frequency sound that irritates a dog, making it run away. The gadgets also have portable sizes and shapes. It makes them convenient to carry around. You only press the button to use them.

They work over long ranges of up to 25 feet for most of them. You won’t take any chances when you spot hurtful behavior in a dog. They will scare away aggressive dogs without having to move close to them.

Ultrasonic Dog Repellers

Which Breeds Respond Well To The Ultrasonic Repellers?

There isn’t any list to show the type of breed the device targets. The gadgets work almost on all breeds, so it’s good to buy and try them on your dog breed. For best results, it’s advisable to train your dog first using this device.

The issue of scaring away dogs should come second. Make sure you aren’t overusing the device or scaring dogs away for fun. The sound they emit is unbearable to dogs and so use it only when the need arises.


You don’t need rocket science to choose your best ultrasonic dog repellent device. Better get informed than going for blind chances when buying the product. The handy tools are practical if you are nervous about a new dog or if your pet barks throughout the night.