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VIOFO A139 Pro vs. Campark DC40 3-Channel Dash Cam Comparison Review

Because of the increasing demands for car security, triple-channel dash cams have been a sought-after product in online marketplaces like Amazon and eBay. Search the keywords and you will be shown hundreds of different brands, both popular and not, ranging from a hundred dollars to over half a grand.

But, if you're on a tight budget, how much should you spend on a decent triple-channel dash cam? In this review, we'll compare two low-cost triple channel, 4K dash cams - the VIOFO A139 Pro and the Campark DC40 - to see which is a better buy.

VIOFO A139 Pro 3-CH vs. Campark DC40 Video Quality

Campark Electronics' DC40 dash cam is the Chinese company's entry into the 4K triple channel section. While it primarily advertises using Sony STARVIS sensors, its front camera is equipped with an 8MP Omnivision sensor that captures up to 2160p at 30 frames per second when recording alone.

Moving on to the in-cabin and rear cameras, these are where the 2MP Sony STARVIS IMX335 sensors are used, capturing footage up to Full-HD 1080P @ 30fps. Note that when all channels are working, the Campark DC40’s video resolution drops to 1440p. The DC40 uses a 170° front camera, a 120° inside camera, and a 140° rear camera to record all directions around your car at the same time, and the interior camera lens is vertically rotatable by 45 degrees.

Now let’s see how much of a pro the A139 Pro is compared to the DC40.

The A139 Pro is VIOFO’s latest addition to its 4K collection, which also includes the A129 Pro. Safe to say, it is the brand’s flagship dash cam, and the first-ever in the industry to use the all-new Sony STARVIS 2 image technology.

Just how much Campark boasts using a Sony STARVIS sensor (although only applicable for its 2MP IMX335 secondary cameras), VIOFO also emphasizes how its video resolution is clearer and crisper due to the Sony STARVIS 2 tech that uses IMX678.

Talking about its field of view, the A139 Pro also supports up to 4K UHD 3840 x 2160P for its front at 140-degrees and Full HD for its rear and interior at 170-degrees. When using the A139 Pro in a 3-Channel configuration, the image quality can be set to 1600p at 30fps or 2160p at 24fps, both of which are 4K.

Best of all, the VIOFO A139 Pro includes a free CPL filter that also works best with the BlackboxMyCar Aqua Shield - an accessory we highly recommend to keep your dash cam view guarded from glare, rain, dust, and other elements that may ruin your footage.

VIOFO A139 Pro 3-CH vs. Campark DC40 Design

Quite similar to how the Vantrue N4 was built, the Campark DC40’s main unit includes the front and interior camera which can be rotated for up to 45-degrees sized at 7.3 x 4.6 x 2.48 inches - which is quite large for a dash cam. It also carries a 2.4-inch IPS color display that is used for video playback and adjusting your camera settings. On top of that, the main unit is the connection for the included suction cup mount, causing the camera to hang low off the windshield - which can be distracting for some drivers.

And distraction is something VIOFO does not want its users to experience. With space-saving dimensions of 4.4 x 2.3 x 1.5 inches, the main unit of the A139 Pro has no screen, allowing for a more seamless and discrete installation. Its low profile allows it to blend in much better with your windshield, making it less distracting for drivers and less appealing to thieves. Even the secondary cameras were designed to be discrete, and the A139 Pro's front 4K camera has a lens that can be rotated up to 300° for better positioning and suitability for all car types. Its IR camera isn't attached to the main body, allowing for more mounting options and flexible angles.

The Campark DC40 uses a suction cup, whereas the VIOFO A139 Pro includes static stickers as an adhesive mount in every package. A suction cup mount can become loose in high heat situations, and can lead to shakier videos than an adhesive mount. The Campark DC40 employs mini USB cables, while the A139 Pro employs an ultra-thin 2.8mm wide coaxial cable and miniature connectors, making it easier to install and run along the trim of your vehicle - particularly in European vehicles with extremely tight trims.

VIOFO A139 Pro 3-CH vs. Campark DC40 Security Features

If you are to leave your car unattended but still want to monitor what’s happening in front, at the rear, and inside of your vehicle, both the Campark DC40 and the VIOFO A139 Pro can capture what’s happening with their parking mode capabilities.

Aside from its Parking Mode capabilities, the Campark DC40 has a G-sensor and Motion Recording, triggering parking mode off of the vehicle’s motion, just like how BlackVue does it.

On the other hand, VIOFO offers more advanced parking mode capabilities with Auto Event Detection, Time Lapse, and Low Bitrate recordings. To activate these features, the Campark DC40 and A139 Pro must be connected through your car’s fuse box through a separate hardwiring kit. For the A139 Pro, you can use VIOFO’s Type-C HK3-C and HK4 ACC hardwirings.

If you want to extend your parking modes, we recommend you to use a dedicated dash cam battery pack. Both the DC40 and the VIOFO A139 Pro are compatible with battery packs like the BlackboxMyCar PowerCell 8 - which we highly recommend to maximize security and peace of mind, even when your car is unattended for longer periods of time.

VIOFO A139 Pro 3-CH vs. Campark DC40 Connectivity and Video Playback Features

As the Campark DC40 dash cam was only released in 2021, you may think that it’s a modern dash cam with innovative connectivity features. However, in reality, this 4K dash cam misses a lot of what makes the dash cam user experience convenient. It doesn’t have GPS, it doesn’t have Wi-Fi, and it doesn’t have a dedicated mobile app.

So we hope you don't mind squinting frequently, because the 2.4-inch screen built into the main unit of the Campark DC40 will be your go-to if you want to watch your videos instantly. If you want to review your footage on a bigger screen, you can pull out your microSD card and plug it to your computer. Note that the maximum SD card capacity supported by the Campark DC40 is 256GB, however, we encountered some user issues regarding playback.

The A139 Pro was launched before they wrapped up 2022, so you can expect that it has higher tech features compared to the Campark DC40. True enough, more than just the built-in GPS, the VIOFO A139 Pro also has built-in Wi-Fi connectivity that offers not just one but a dual-band connectivity - 2.4GHz and 5GHz. This allows faster data transfer and ensures smooth video streaming, downloading, and sharing through the dedicated VIOFO app.

The VIOFO app, which is available for iOS and Android devices, is included with the A139 Pro. VIOFO also increased the A139 Pro's storage capacity by increasing the maximum SD card capacity to 512GB, which is impressive as most dash cams can only cater up to 256GB.

VIOFO A139 Pro 3-CH vs. Campark DC40 Price

Compared to other premium triple-channel dash cams like the BlackVue DR770X Box, VIOFO’s entry on the triple-channel segments like the T130 and the A139 Pro are comparably more cost-effective, with the A139 Pro 3CH dash cam only at $369.99.

And as expected, the Campark DC40 is priced lower for only $139.99. But we’re not here to question it, as it lacks a lot of important features such as GPS, Wi-Fi, and dedicated mobile apps. Moreover, the DC40’s image sensors are quite inferior compared to the A139 Pro’s true 4K, 8MP Sony STARVIS IMX678. It also has encountered reliability issues, so if you were to spend money for this dash cam, you must be up to taking the risk.

Verdict: VIOFO A139 Pro 3-CH vs. Campark DC40- Which is better?

With the hundreds of options available in the market, finding a low-cost dash cam is now a breeze. However, as a customer, keep in mind that in some products, you just get what you pay for.

The Campark DC40 is a surprisingly affordable triple channel 4K dash cam. However, the reality is that it only records 1440p when using all three channels. Even if it uses 8MP Omnivision sensors for its front, the A139 Pro’s latest 8MP Sony STARVIS 2 technology is more worth it as it provides smoother, balanced, and crisper videos in all lighting conditions. It also comes with a CPL filter that reduces glare and reflections, working best with its HDR and Super Night Vision Capabilities.

In terms of form factor, the Campark DC40 is huge and can be distracting, which is a no-no for some states in the US. When viewing videos, you will also have to rely on its small screen behind the unit, especially when it doesn’t have a mobile app and Wi-Fi connectivity features. It doesn’t have a GPS either.

On the other hand, the A139 Pro is designed to be discreet and screenless, as VIOFO values saving space, reducing distractions, and taking dash cam legalities into account. Even if it doesn’t have a screen, you can instantly watch, download, and share footage using the dedicated VIOFO mobile app. Connectivity is also seamless, as the A139 Pro comes with built-in dual band Wi-Fi and other important features like built-in GPS, Voice Notifications, and advanced Parking Modes.

With all the features of the A139 Pro, it’s easy to justify its price. What matters more is that more customers have already put their trust in the VIOFO brand for decades, which is a proof of how dependable the A139 Pro can be.


VIOFO A139 Pro 3-Channel

Campark DC40 3-Channel

Video Resolution

4K UHD @30FPS | 1080p Full HD @30FPS | 1080p Full HD @30FPS

4K UHD @30FPS | 1080p Full HD @30FPS | 1080p Full HD @30FPS

Image Sensor

8MP Sony STARVIS 2 IMX678 | 2MP Sony STARVIS IMX291 (secondary)

8MP Omnivision | 2MP Sony STARVIS IMX 335 (secondary)

Field of View (F|R|I)

140° | 170° | 170°

170° | 140° | 120°




Parking Mode

Yes, 3 Parking Modes





Operating Temperature

-10°C - 65°C (14°F - 149°F)

-20° to 70° C (-4° to 158° F)

Loop Recording



Max SD Card

512 GB

256 GB

LCD Screen




Yes, Dual-band


Mobile App









Country of Origin



Manufacturer Warranty

1-Year Manufacturer Warranty

1-Year Manufacturer Warranty