WOLFBOX G840S 12″ 4K Mirror Dash Cam Review: Specs, Pros and Cons

As Amazon Associates, we earn from qualifying purchases. This means we may receive a small commission at no extra cost to you if you click through and make a purchase.

As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.

This wolfbox g840s 12 4k mirror dash cam review covers a device that combines a large display with high-resolution recording. It features a 12-inch screen that replaces your standard rearview mirror. The front camera records in 4K UHD resolution, while the rear camera captures 1080p video. This setup provides clear footage for both directions. The unit also includes built-in GPS and 5.8GHz Wi-Fi for easy data access. You get a 32GB card included for storage. The design is black and weighs 1.83 pounds. It is built for cars and trucks. The split-screen function lets you view both cameras at once. This guide explains how these specs work in practice.

• 12-inch display offers 1.5 times the viewing area of a standard mirror.
• 4K UHD front camera resolution captures detailed video footage.
• 170-degree front lens and 140-degree rear lens minimize blind spots.
• 5.8GHz Wi-Fi allows real-time viewing via the WOLFBOX app.
• 24-hour parking monitor with time-lapse mode requires a hardwire kit.

Good fit for

You should consider this dash cam if you want a single unit that replaces your mirror and provides extensive coverage. The large 12-inch screen is ideal for drivers who need a wider field of view to reduce blind spots. The 4K front resolution is suitable for those who prioritize high-detail evidence. If you frequently share video clips with insurance companies or family, the 5.8GHz Wi-Fi connectivity makes transferring files to your phone simple. The included 32GB card is a helpful start for recording. This setup works well for cars and trucks where you want integrated front and rear detection without installing multiple separate devices.

Who can skip it

You should look elsewhere if you prefer a compact, discreet dash cam. This unit is a full-size mirror, measuring 11.9 inches long and 2.83 inches wide. It will be visible and take up significant space on your windshield. If you do not want to replace your existing rearview mirror, this product is not for you. Additionally, the 24-hour parking monitor requires a separate hardwire kit, which is not included. If you are on a tight budget and cannot afford extra accessories, this may not fit your needs. The large screen also means more glare management is required compared to smaller mirrors.

Verdict

The WOLFBOX G840S is a robust choice for drivers who want a large display and high-resolution recording in one package. Its 4K front camera and wide-angle lenses make it a practical tool for safety and evidence.

Key specs explained for this dash cam

Video Resolution: 4K UHD

The front camera records at 2160p, which provides significantly more detail than standard 1080p footage. This high clarity helps you read license plates and identify road signs clearly. The rear camera records at 1080p, offering a solid backup view. You benefit from sharper evidence in case of an incident. Compare this to lower-resolution models if you need precise identification of other vehicles or road hazards.

Field of View: 170° front, 140° rear

The wide-angle lenses capture a broad scene, reducing the blind spots common with narrower cameras. A 170-degree front view covers multiple lanes, while the 140-degree rear view helps when reversing. This wide coverage ensures you capture more of your surroundings. You benefit from better situational awareness during driving. When shopping, check if other models offer similar wide angles to maximize your recording coverage.

Connectivity: 5.8GHz Wi-Fi

This frequency allows your phone to connect directly to the dash cam for quick video transfers. You can view live feeds and playback recordings using the companion app on iOS or Android devices. The 5.8GHz band often provides a faster and more stable connection than older 2.4GHz models. You benefit from easy sharing of important clips without removing the memory card. Compare this feature to models that require physical card removal.

Included Storage: 32GB

The package includes a 32GB memory card, which is necessary for storing your recorded video files. This storage capacity allows for a reasonable amount of loop recording before older files are overwritten. You benefit from having a card ready to use right out of the box. Compare this to models that do not include storage, as you would need to purchase a compatible high-endurance card separately for proper operation.

Design and build details

The listing describes the WOLFBOX G840S as a black unit with a 2.5D curved screen. This design allows it to blend seamlessly into most vehicle interiors. The display measures 12 inches in length, providing 1.5 times the viewing area of a standard mirror. This larger surface reduces blind spots by showing both front and rear feeds simultaneously. The split-screen function lets you monitor both lenses at once.

According to the listing, the device weighs 1.83 pounds. Its dimensions are 11.9 inches long, 2.83 inches wide, and 0.71 inches high. The extra-large size means it will dominate your rearview space. You must ensure your vehicle’s mounting points can support this weight and size. The black finish matches most dashboard colors, but the physical footprint is substantial.

The front lens has a 170-degree field of view, while the rear lens covers 140 degrees. This wide angle minimizes side blind spots during driving and reversing. The unit includes an external GPS antenna for real-time data display. A 32GB card is included for storage. You should use only original brand accessories to maintain the 12-month guarantee. Improper installation or non-original parts may void coverage.

Setup and everyday use

You install this mirror dash cam by replacing your existing rearview mirror. The unit connects to your vehicle’s power source. For parking monitor mode, you must purchase a separate hardwire kit. This allows the device to record while the engine is off. The camera uses loop recording to overwrite old files when storage is full. It includes a 32GB card to hold your footage.

The device features 5.8GHz Wi-Fi. You connect your iOS or Android phone to this network. The WOLFBOX app lets you view live feeds and play back recordings. You can also share videos directly from the app. An external GPS antenna displays your speed and location on the screen. This data is recorded with your video.

Daily use is straightforward. The 12-inch screen replaces your glass mirror. You see the front view from the 170-degree lens and the rear view from the 140-degree lens. You can use split-screen mode to see both cameras at once. The WDR and HDR technology balances lighting in bright or dark conditions. The low-reflectivity LCD reduces glare during the day. This setup helps you monitor blind spots while driving or reversing. The system runs continuously while you drive. It stops when you turn off the ignition, unless the hardwire kit is installed for parking surveillance.

Before you buy this dash cam

You should verify that your vehicle’s electrical system supports the power requirements for 24-hour parking monitor mode. The listing notes that a hardwire kit is required for this feature, so you will need to purchase it separately if you want continuous surveillance. You must also check that your smartphone is compatible with the WOLFBOX app for iOS or Android to access live viewing and playback via the 5.8GHz Wi-Fi connection. Keep the 32GB included card in mind; you may want additional storage for longer recording loops. This unit fits well alongside other large-screen mirror cameras in Car Electronics, offering a wider field of view than standard models. Regularly clean the 2.5D curved screen to maintain clarity. Ensure you use only original accessories to avoid voiding coverage or causing damage. This practical approach ensures the device integrates smoothly into your daily driving routine without unexpected issues.

Check before you buy

• Confirm your phone supports the WOLFBOX app for iOS or Android.
• Purchase a separate hardwire kit for 24-hour parking monitor mode.
• Verify your vehicle’s mirror mount fits the 12-inch display dimensions.
• Ensure you have sufficient power for continuous loop recording.

Specifications side by side

Spec	WOLFBOX 12-Inch 4K Mirror Dash Cam
Camera Configuration	Front and Rear
Video Resolution	4K UHD
Field of View	170° front, 140° rear
Connectivity	5.8GHz Wi-Fi
Included Storage	32GB
Resolution	4K
Color	Black
Recommended Use	Cars & Trucks
Detection Coverage	Front and Rear Detection
GPS Features	Built-in GPS
Included Camera	Backup Camera
Dimensions	11.9 × 2.83 × 0.71 inches
Weight	1.83 pounds
Size	G840S
Model	G840

Frequently asked questions

Does the WOLFBOX G840S include GPS tracking?

Yes, this model features built-in GPS. This specification allows the device to record your vehicle’s speed and precise location data alongside your video footage. You can use this information to verify the context of any driving events or incidents captured by the front and rear cameras.

What is the weight of this mirror dash cam?

The unit weighs 1.83 pounds. This weight is a practical consideration for installation, as the device replaces your standard rearview mirror. You should ensure your vehicle’s mirror mount can support this mass without sagging or becoming unstable during driving.

Does it come with a memory card included?

Yes, the package includes a 32GB storage card. This card is necessary for saving the 4K front and 1080p rear video recordings. You should format the card according to the manual before your first use to ensure optimal performance and file organization.

What Wi-Fi speed does the G840S support?

It supports 5GHz Wi-Fi connectivity. This faster frequency band allows you to transfer video files to your smartphone more quickly than older 2.4GHz models. You can use the companion app to view live feeds and download recordings directly from the device.

Is this dash cam suitable for trucks?

Yes, the listing recommends it for both cars and trucks. The 12-inch display provides a large viewing area that remains effective in larger vehicles. The robust front and rear detection coverage helps monitor blind spots common in trucks and larger SUVs.

How wide is the WOLFBOX G840S unit?

The device measures 2.83 inches in width. This slim profile ensures it does not obstruct your view of the road or your side mirrors. The compact width complements the 11.9-inch length, creating a balanced mirror replacement that fits most standard dashboard spaces.

See also

• wolfbox g840s 12 4k mirror dash cam alternatives
• WOLFBOX vs REDTIGER dash cam
• ring outdoor cam 4k pro review
• ring spotlight cam 4k plus review