Electronic Watchdog: Review & Recommendations

Welcome to our big Electronic Watchdog Test 2020, where we present all the electronic watchdogs we have tested in detail. We have compiled detailed background information for you.

We want to make your purchase decision easier and help you to find the best electronic watchdog for you.

You can also find answers to frequently asked questions in our guide. If available, we also offer you interesting test videos. You will also find some important information on this page that you should pay attention to if you want to buy an electronic watchdog.

The most important facts in brief

  • Electronic guard dogs are effective in deterring unwanted guests and burglars and thieves.
  • By means of a motion sensor, the device notices the burglar and then lets the deceptively real dog barking sound.
  • Electronic guard dogs are not only suitable against burglars, but can also deter cats and other unwanted animals.

Electronic watchdog test: Favourites of the editors

  • The best electronic watchdog with motion sensor
  • The best electronic watchdog with different sounds
  • The best electronic watchdog with 360° coverage

The best electronic watchdog with motion sensor

The electronic guard dog from KH Security convinces with its deceptively real dog barking. It has a power supply unit and is easily mounted on the wall.

Its motion detector reaches through doors made of wood, concrete, glass and plastic and has a range of 3.5 metres. According to customer reviews, it is also impressive because of its volume, which can be easily heard through the door and window.

The best electronic watchdog with different sounds

The Indexa electronic watchdog is known for its ease of use and effectiveness. The barking of the dog sounds real and equipped with a power supply unit, the guard dog can be easily placed at the desired location.

The watchdog includes a remote control and a sticker warning the dog for additional deterrence of burglars. According to customer reviews, the watchdog is also well suited to deter cats and various other unwanted animals.

The best electronic watchdog with 360° coverage

The Sygonix electronic watchdog has a remote control with which the electronic watchdog can be easily switched on and off. It has a power supply unit and can be placed in the given location.

According to customer reviews, the dog barking is deceptively real and the dog also growls from time to time to make the barking seem even more real. In terms of price, the electronic watchdog from Sygonix is in the lower price range.

Guide: Questions you should consider before buying an electronic watchdog

How does an electronic watchdog work?

Electronic guard dogs are designed to deter burglars or thieves. The burglar or thief triggers a built-in radar or motion detector and a recording of dog barking is played.

The recording of the dog barking is at best very real, so that the burglar or thief gets the impression that there is a large possibly dangerous dog behind the door or behind the window.

The motion sensor is normally placed or mounted near the door or window. Ideally, the sensor will detect when something is moving behind the door, window or wall and sound the alarm.

The dog barking can be heard through windows, doors and walls, so that the burglar or uninvited guest really believes that there is a dog behind it.

The electronic watchdog also serves to deter certain animals. Customers have reported that their electronic watchdog specifically discourages cats and other small animals.

Did you know that you can permanently arm the electronic watchdog?
With it, the motion detector makes the dog bark as soon as someone enters your property through a gate.

For whom is an electronic watchdog suitable?

An electronic watchdog is suitable for anyone who wants to feel a little safer at home or has problems with small animals in their garden.
Not everyone has the time, money or space to get a dog. However, if you would still like to have a guard dog as a deterrent against burglars and thieves, an electronic guard dog is just what you need.

Electronic guard dogs are very easy to maintain, simple to install and set up and can be the perfect precautionary measure for you. The barking of the dog sounds very real in the ideal case and can usually be adapted to your situation according to your wishes.

Is an electronic guard dog suitable for mobile homes?

The electronic watchdog is also suitable for holidays and can be placed in mobile homes or caravans, for example.
If you like to feel a little safer when sleeping or are afraid for your valuables during a trip, the electronic watchdog is perfect for deterring burglars on the road.
However, you must make sure that the motorhome is not placed too close to trees or bushes, for example. The movement of the trees and bushes by the wind could possibly trigger the electronic watchdog.

What does an electronic watchdog cost?

The price of the electronic watchdog depends very much on its quality, range, manufacturer and characteristics.
The cheaper models are offered starting from a price of 20€. However, you can also spend up to 80€ for an electronic watchdog. However, there are also models that have many different features and therefore cost a little more.

Where can I buy an electronic watchdog?

Electronic guard dogs are available in many different shops. Probably the easiest option is to order the electronic watchdog from an online shop such as Amazon or eBay.
However, electronic watchdogs are also available at Tchibo, electronics stores such as Media Markt or Saturn or in DIY stores such as Obi. They have also been in the assortment of Aldi and Hofer.
While you can get personal advice on the various models in the specialist shops, there are numerous comparisons and videos of the individual models on the Internet. These can give you a lot of help in finding the right electronic watchdog for your use.

What are the alternatives to an electronic watchdog?

As an alternative to an electronic watchdog, you can also get an alarm system. However, an electronic watchdog is usually cheaper and easier to install and operate.

Intrusion protection
Alarm system

To give you some more alternatives, I have made a small list for you.
Depending on the type, they have their own advantages and disadvantages.

Decision: What types of electronic guard dogs are there and which one is right for you?

Basically we distinguish between these types of electronic guard dogs:

  • Electronic guard dogs with battery
  • Electronic watchdogs with power supply unit

In the following we explain the different types and the respective advantages and disadvantages. With this we want to help you to find the most suitable electronic guard dog for you.

What distinguishes an electronic watchdog with battery and what are its advantages and disadvantages?

Electronic watchdogs are available for purchase battery operated. Battery-powered guard dogs are very flexible to set up, as they do not need a power outlet nearby. So you can easily place them inside your motorhome or outside (if appropriate).


Flexible installation
Optically more beautiful (without annoying cable)


Batteries must be replaced regularly

However, you must make sure that you regularly check whether the batteries are still sufficiently charged and replace them if necessary.

What distinguishes an electronic watchdog with power supply and what are its advantages and disadvantages?

Just as there are battery powered electronic guard dogs, you can also buy them with a power supply. Electronic guard dogs with an AC adapter are very easy to care for, as they do not have batteries that need to be checked and replaced regularly.


Easy to clean


Power connection must be available
Optical limitation due to power cable

However, you must make sure that there is a power outlet where you want to place the electronic watchdog. In addition, the power cord can also cause a visual impairment.

Purchase criteria: You can compare and evaluate electronic guard dogs based on these factors

In the following, we will show you which criteria you can use to compare and evaluate electronic guard dogs. This will make it easier for you to get an overview and to decide on a suitable and effective model.

In summary, these criteria are as follows:

  • Manufacturer
  • Reach
  • Handling

In the following you can read what the respective criteria are and find out why it makes sense for you to purchase a model according to the criteria or not.


Probably the best known manufacturers of electronic watchdogs are Pentatech and Sygonix. However, there are also a number of other manufacturers who offer electronic watchdogs for sale.

Besides Pentatech and Sygonix you will find electronic guard dogs from Blaupunkt, Indexa, Isotronic, Cordes and various other manufacturers. Each manufacturer and each model has its advantages and disadvantages.


Electronic guard dogs are available with ranges of the motion or radar sensor between 3.5 and 15 meters. The accuracy of the manufacturer’s specifications varies and it is recommended to read the buyer’s reviews.

Which range is best for you depends on where you want to place the electronic watchdog. If it is placed directly next to the front door, a small range is sufficient.

A small range is also recommended for use in motor homes, so that the radar sensor does not sound an alarm every time a pedestrian passes by.

However, if the electronic guard dog is to frighten cats and other animals on the terrace, a greater range is recommended.

However, for many models the range can be adjusted accordingly, whereby a longer range is advantageous.


Electronic guard dogs come in different versions and with various extras. When buying, you have to decide which extras are most important for you and which model has the most important features.

Some electronic guard dogs have a remote control that allows the guard dog to be switched on and off conveniently from a distance. In addition, the remote controls usually also have a panic button, which can be pressed very easily in an emergency to scare away the unwanted guest.

Other electronic guard dogs include a sticker that warns of a dangerous dog. This also serves as a deterrent to unwelcome guests.

Selected electronic guard dogs can also be adjusted for personal use. For example, you can adjust the volume, adjust the range to your own needs, but also choose between different types of dog barking.

Trivia: Worth knowing facts about the electronic watchdog

How do I operate an electronic guard dog?

Most electronic guard dogs are very easy to operate with an on/off button.
Some also have a remote control that allows you to switch the device on and off yourself, and often have an emergency button that you can easily press when the occasion arises.

With other electronic guard dogs you can also adjust the volume, the type of dog barking, the range of the sensor and other settings. This makes operation somewhat more difficult, but each model comes with a corresponding manual.

Where do I set up the electronic guard dog?

The electronic watchdog usually stands next to a door or window. You have to think for yourself where you can most likely expect a burglar.

You also have to test where the electronic watchdog can best sound the alarm. Your electronic watchdog’s sensor may not reach through certain doors, such as a metal front door. You should try this before use.

You can also set up the watchdog outside if your watchdog is suitable for outdoor use. Not only unwanted visitors can be deterred, but also cats and other unwanted animals.

Are there videos of electronic guard dogs?

It is not easy to choose the perfect electronic watchdog without having heard the dog barking. That’s why many manufacturers offer videos on how the barking of dogs sounds in real life. Here for example a model is shown.

There are also videos on electronic guard dogs that explain and compare different models.

Can I build an electronic watchdog myself?

Electronic watchdogs can be built just like alarm systems. However, this is not easy and you need electrical knowledge and a lot of manual skills. In the internet you can find various instructions for this.

However, it is doubtful whether it is cheaper to build an electronic watchdog yourself than to buy a finished watchdog, since many individual parts and tools are needed to build an electronic watchdog.