2K vs 4K Security Camera: Which One Should You Choose?

In the realm of security cameras, the decision between 2K and 4K resolutions poses a common dilemma. As we strive for improved home security and the convenience of monitoring pets from afar, the technical intricacies may overwhelm first-time buyers. Join us in this blog post as we explore the differences between these advanced camera resolutions. Unraveling the distinct features and advantages between 2k and 4k security camera, we aim to empower you with the knowledge to make an informed choice, perfectly tailored to your surveillance requirements. Let's navigate the resolution maze together, unlocking the ideal security solution for your needs.


Resolution and Image Quality Explanation

Generally speaking, security camera resolution refers to the number of horizontal and vertical pixels in an image. The higher the resolution, the more pixels in an image, which can provide more detail and is considered better image quality.

2K resolution is usually informally used to refer to resolutions with approximately 2000 horizontal pixels, such as 2560 × 1440 pixels. While 4K resolution means that the pixel value of each line in the horizontal direction reaches or is close to 4096 pixels, and the most commonly used 4K resolution in electronics and video production is 3840 × 2160 pixels.

Now, you have a basic knowledge of 2K and 4K to help you figure out which to choose after reading the information in this part. Next, a detailed comparison between 2K and 4K security cameras with pros and cons will be offered.

2K vs 4K Security Camera: Pros and Cons

After learning what resolution and image quality means, you may be curious about the difference between 2K and 4K cameras. In this part, we will compare the pros and cons of 2K security cameras and 4K security cameras in detail, so that you can learn more about both sides.

2K Security Camera

There are two common types of 2K security cameras currently in use, one with a resolution of 1920x1080 pixels and the other with a resolution of 2560x1440 pixels. The former represents the more standard resolution for security cameras, while the latter provides a clearer image.


  • Provide enough image details to meet the needs of most security surveillance applications.
  • Require less bandwidth and storage space for image processing, transmission, and storage.
  • Usually have a lower price, which is suitable for security surveillance projects with limited budgets.


  • Have lower resolution and may not be able to capture some details, such as facial features or license plate numbers, etc.
  • Image quality is not as good as 4K cameras with relatively poor detail, contrast, and color.

4K Security Camera

4K security cameras are quickly becoming the surveillance standard, delivering UHD images at resolutions of either 3840x2160 pixels or 4096x2160 pixels. However, in most cases, when we talk about a 4K security camera, we are referring to 3840x2160 pixels resolution more commonly. Using a 4K security camera allows for digital zoom and panning, improving clarity and color while maintaining the highest video quality.


  • Provide higher resolution and can capture more details, such as facial features, license plate numbers, etc., making the image clearer and more subtle.
  • Offer richer colors, higher contrast, and more realistic image quality due to higher pixel density.


  • Require more bandwidth and storage space for image processing, transmission, and storage, and may require higher network bandwidth and larger storage devices.
  • More expensive than 2K cameras, which may be a budget concern.

2K vs 4K Security Camera: A Quick Comparison

Just in case you missed some information while reading the above content, here is a simple table of the most important points to help you quickly compare 2K and 4K security cameras.

Comparison Factors

2K Security Camera

4K Security Camera


2560x1440 pixels

3840x2160 pixels

Field of View



Image Quality

QHD (Quarter High Definition)

UHD (Ultra High Definition)

Captured Details


Clearer and sharper




Bandwidth Requirement



Storage Requirement



Price Range

Relatively lower

Relatively higher


In summary, 4K security cameras have clearer and higher quality images than 2K security cameras and can provide a better user experience at a higher price.


In addition to the factors listed above, there are several other factors that may affect your experience, such as brand, model, manufacturer, and technology. Actual performance and features may vary. Therefore, when making a purchase, it is recommended that you choose the most suitable security camera according to your actual specific needs and product specifications.

When to Choose a 2K or 4K Security Camera?

In the previous part, we discussed the differences between 2k and 4k security cameras in terms of technical specifications. However, it may be a headache for a technical novice. Therefore, in this part, we will start with the practical situation to help you choose 2k and 4k security cameras from case by case.

Situations When You Need a 2K Security Camera

In fact, if there are no special requirements, 2K security cameras can fully cover all your daily monitoring needs at an affordable price. For example:

  • Indoor surveillance. 2K security cameras are good enough to capture high-definition images with clear details in all indoor places such as a house, hotels, offices, and so on.
  • A minor place for monitoring. As for the places with limited areas, a 2K camera is able to capture adequate details to detect the movements of objects.
  • Remote monitoring. 2K security cameras can transmit high-quality images over the internet, enabling you to view and monitor live video remotely.
  • Low-budget project. Compared to 4K security cameras, 2K security cameras are more affordable and meet most people's budgets.


Situations When You Need a 4K Security Camera

If you are looking for the highest quality camera to protect your home or business with a sufficient budget, then you can choose 4K security cameras. Here are some situations where you may need 4K camera quality:

  • Require more image details. 4K security cameras can easily capture facial features, license plate numbers, or other important details that require higher resolution cameras.
  • Wider surveillance. 4K security cameras feature a wider field of view to monitor a larger area with a clear and sharp image, even when the object is far away from the camera.
  • Advanced security needs. 4K camera quality makes it easier to detect potential security threats in important locations like banks, government buildings, and critical infrastructure.
  • Digital post-processing. 4K cameras are superior for image capture due to their high processing rate, ensuring detail and clarity even with digital enhancement or post-processing. This is crucial for forensics, investigations, and legal proceedings.

Best 2K and 4K Security Camera Recommended

If you are looking for recommendations, you can go straight to this section. When choosing a security camera, we prioritize camera performance, functions, ease of use, and security. Next, read on for our picks for the best 2K security camera system and the best 4K security camera system on the market today.

The Best 2K Security Camera

Our pick for the best 2K security camera is the E220 Indoor Security Camera, which is highly recommended for indoor surveillance. This indoor security camera has a 2K resolution and nearly 4 million pixels, which can provide you with clear and detailed images.


Equipped with infrared night vision, it allows you to see what's going on even in low-light conditions. In addition, it comes with an AI Detection feature that has an intelligent automatic tracking function, capable of tracking any moving object, making it perfect for monitoring people or pets.


Furthermore, it can work with voice assistant, which allows you to have real-time conversations with anyone passing through the camera remotely. As for storage, this IP Camera supports not only local storage but also cloud storage, and NAS (RTSP) storage methods over Wi-Fi, ensuring that your video recordings can be stored for a long time. Overall, this indoor security camera is an excellent choice for monitoring a specific area.


The Best 4K Security Camera

When it comes to outdoor security cameras, the S330 eufyCam is our first pick. With 4K UHD resolution and nearly 8 megapixels, it delivers crystal clear, crisp image detail wherever and whenever you need it. Plus, you don't need to worry about storage. It comes with 16GB of built-in EMMC memory, allowing for up to 3 months of recording storage. Furthermore, it's possible to install up to 16TB of expanded local storage.


Equipped with a 135° field of view, it can effortlessly capture objects in a larger and wider area, helping you monitor any activities from a distance with clear images. Furthermore, it features AI detection that can distinguish family members from strangers with 99% accuracy. In addition, its AI is capable of detecting humans, vehicles, and pets, which greatly reduces potential risks.


This 4K security camera automatically switches to infrared and color night vision with built-in spotlights to enhance image clarity in low-light conditions. As a wireless camera, you may be worried about battery life. Fear not, it comes with a solar panel that requires only 2 hours of direct sunlight per day to keep the battery charged. This means that the camera is always powered up and ready to use.




When comparing 2K vs 4K security cameras, 4K cameras offer a higher definition and are typically more expensive than 2K cameras. However, it's important to consider the output requirements when choosing between the two. If the broadcast end only supports HD, a 2K camera will suffice. Ultimately, the decision between the two types of cameras comes down to suitability rather than quality, as there is no clear winner.

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