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RateLab Automotive Car Backup Cameras WOLFBOX G840S (Premium Option)
Dash Cam Combo Consider

WOLFBOX G840S 12" 4K Mirror Dash Cam with Backup Camera

Solid feedback from a large number of buyers -- front 4K dash cam and backup camera in one mirror-mounted unit.

Updated

TL;DR
  • Solid feedback from the largest buyer base in this comparison
  • 12-inch mirror display -- 1.5 times the width of a standard rearview mirror
  • 4K UHD (2160P) front camera with WDR and HDR for balanced exposure
  • 1080P rear camera -- shows backup view when reversing
  • GPS included -- displays speed and location data, logs routes
  • 5.8GHz WiFi -- connect to the WOLFBOX app for playback and clip sharing
  • 32GB card included -- starts recording immediately out of the box
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Best For / Not For

Best for

  • Buyers who want front dash cam recording and a backup camera in a single device
  • Drivers who want GPS and a companion app for route logging and clip sharing
  • Buyers who want the largest display in this comparison

Not for

  • Buyers who need a backup camera as the primary function -- the G840S is primarily a dash cam
  • Buyers on a budget -- this is the premium option in the comparison

Key Details

BrandWOLFBOX
ASINB0811Q28N6
TypeMirror dash cam with 4K front + 1080P backup camera
Display12 inch, 2.5D curved LCD
Front camera4K UHD (2160P), 170-degree, WDR + HDR
Rear camera1080P, 140-degree
GPSYes, external antenna included
WiFi5.8GHz, WOLFBOX app (iOS and Android)
Storage32GB card included, loop recording

When the WOLFBOX G840S Makes Sense

The WOLFBOX G840S is not primarily a backup camera -- it is a dash cam that includes backup camera functionality. The 4K front camera records continuously and is the central feature. The backup camera activates when you shift into reverse and shows a 1080P wide-angle view on the 12-inch display. For buyers who want one device to handle front dash cam recording and rear visibility, the G840S is the only option in this category that does both.

The front camera is the core of the G840S. It records in 4K UHD with a 170-degree lens, and WDR and HDR processing help the camera handle the contrast between bright sky and shaded road that makes many dash cams produce unusable footage. The GPS antenna logs speed and location, and the 5.8GHz WiFi connects to the WOLFBOX app for clip playback and sharing on iOS or Android.

The rear camera is the secondary component. It records at 1080P with a 140-degree lens, a step down from the 4K front camera, because the device is optimized for front recording. That is the reason the G840S earns a Consider rather than Buy verdict despite its large buyer base. If a backup camera is the primary need, the wired options in this review will serve that purpose better.

Pros and Cons

Pros

  • Solid feedback from a large number of buyers
  • 4K front recording with WDR and HDR provides professional-quality highway footage
  • 12-inch display is noticeably larger than the AUTO-VOX OEM mirror alternative
  • GPS, WiFi app, and 32GB card included -- fully functional out of the box
  • Front recording continues at all times, backup view appears only in reverse

Cons

  • Rear camera is 1080P with a 140-degree lens, a step down from the 4K front camera
  • Wiring for front camera and rear camera both required
  • Premium price compared to camera-only and simpler kit alternatives

Bottom Line

Consider the WOLFBOX G840S if you want front 4K dash cam recording and backup camera visibility in a single system and can accept that the rear camera is not the primary focus of the device. The front camera records in 4K with WDR and HDR. If the backup camera is your main need, start with the PixelMan PMD2A-S or Xroose Solar Wireless instead.

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