# WOLFBOX G840S Mirror Dash Cam Review: Rearview Mirror Revolution
Transforming your vehicle’s rearview mirror into a high-tech safety device, the WOLFBOX G840S 12-inch Mirror Dash Cam represents an innovative approach to vehicle security that goes beyond traditional dash camera designs. This rearview-mirror-mounted system offers comprehensive front and rear recording while maintaining the familiar form factor that doesn’t obstruct your windshield or draw attention to valuable electronics.
## Revolutionary Mirror Design
The G840S replaces your existing rearview mirror with a full-width LCD display that continues functioning as a mirror while providing live video from front and rear cameras. This dual-purpose approach eliminates the suction-cup-mounted dash cam aesthetic that can obstruct your view and potentially block evidence in accident scenarios. The 12-inch touchscreen dominates your rearview area, providing an expansive display that actually improves rear visibility compared to traditional mirrors in many situations.
The mirror’s IPS display delivers crisp, clear video at all viewing angles, with adjustable brightness that adapts to changing light conditions automatically. The touchscreen interface provides intuitive access to settings and playback without requiring separate buttons or complicated controls. This streamlined design reduces cockpit clutter while centralizing all dash cam functionality within the familiar mirror location.
## 4K Front Recording Quality
The G840S captures remarkably detailed footage through its front camera with 4K resolution that rivals dedicated dash cams costing significantly more. License plates, road signs, and facial features appear with clarity that proves invaluable when documenting incidents or providing evidence to insurance companies and law enforcement. This resolution advantage becomes especially apparent when reviewing footage on larger screens or zooming to examine specific details.
The 170-degree wide-angle front lens covers multiple traffic lanes while minimizing the fish-eye distortion that plagues wider-angle alternatives. This coverage proves ideal for capturing intersection activity, lane changes, and peripheral events that traditional narrow-field dash cams miss. Combined with the 4K resolution, this wide coverage creates comprehensive documentation of everything happening around your vehicle.
## Full HD Rear Camera Performance
The rear camera mounted near your license plate captures 1080p video that integrates seamlessly with front recording, providing a complete 360-degree awareness perspective. The rear camera excels in parking situations, showing approaching vehicles, pedestrians, and obstacles that would otherwise require turning around to observe. This rear visibility proves particularly valuable for larger vehicles like SUVs and trucks where rear blind spots are significant.
Waterproof housing protects the rear camera from the elements, ensuring reliable operation regardless of weather conditions. The included 32GB SD card provides adequate storage for several hours of loop recording before footage cycles, with loop recording automatically overwriting oldest non-locked files while preserving event footage. This automated storage management requires minimal user attention while ensuring continuous recording capability.
## Advanced Night Vision Technology
Low-light performance often determines dash cam effectiveness, and the G840S addresses this challenge with advanced night vision capabilities in both front and rear cameras. Sony’s advanced sensor technology captures usable footage in conditions that would render lesser cameras useless, with automatic light adjustment preventing the washed-out or pitch-black images typical of budget alternatives. The rear camera’s infrared illumination provides additional visibility in complete darkness, making nighttime parking monitoring genuinely effective.
The WDR (Wide Dynamic Range) feature balances exposure in high-contrast scenes that would otherwise lose detail in shadows or highlights. This dynamic range optimization proves essential for downtown driving, tunnel entrances, and any scenario where lighting varies dramatically within the camera’s field of view. Combined with the night vision enhancements, WDR ensures the G840S captures useful footage across the full range of driving conditions.
## GPS Tracking and Data Logging
Built-in GPS capability stamps recorded footage with location coordinates, speed data, and timestamps that prove invaluable when reconstructing events. This metadata provides objective evidence of your vehicle’s position and speed at any moment, supporting accident reconstruction and insurance claims with verifiable data rather than subjective recollection. The GPS logger integrates with video playback in the companion app, displaying your route on a map alongside recorded footage.
Parking mode extends protection beyond active driving, automatically recording when motion or impact is detected while your vehicle is stationary. This surveillance capability has helped countless drivers identify hit-and-run perpetrators and document vandalism incidents that would otherwise go unsolved. The G-sensor sensitivity is adjustable to prevent excessive triggering from passing traffic or wind, ensuring only meaningful events trigger parking mode recording.
## Professional Installation Experience
The G840S installation requires slightly more effort than basic dash cams due to the mirror replacement design, but the included instructions guide users through the process clearly. Routing cables behind interior trim creates a clean appearance that maintains your vehicle’s stock aesthetics while ensuring wires don’t interfere with visibility or controls. The included tools help with trim removal if needed, though most users report successful installation in under an hour.
Hardwiring kits are available separately for those seeking continuous parking surveillance without draining their vehicle battery. This professional installation option transforms the G840S into a true 24-hour security system that protects your vehicle around the clock. The investment in hardwiring pays dividends for users regularly parking in areas where vandalism or theft concerns exist.
## User Interface and App Connectivity
The touchscreen interface proves responsive and intuitive, with clearly labeled options that make adjusting settings straightforward even for users unfamiliar with dash cam technology. WiFi connectivity allows smartphone app access for footage viewing, downloading, and sharing without removing the SD card. This wireless convenience makes it easy to provide incident footage to police or insurance adjusters immediately after events occur.
The companion app available for both iOS and Android devices provides comprehensive functionality including live preview, footage management, and settings adjustment. Firmware updates delivered through the app ensure your G840S stays current with the latest features and performance improvements, extending the device’s useful life while adding functionality over time.
## Final Assessment
The WOLFBOX G840S Mirror Dash Cam delivers innovative design combined with serious recording capability, offering an attractive alternative to traditional dash cam form factors. Its 4K front recording, Full HD rear coverage, and advanced features like night vision, GPS tracking, and parking mode provide comprehensive vehicle protection that justifies the investment. For drivers seeking effective security without compromising their vehicle’s appearance or windshield visibility, the G840S represents an excellent choice that delivers professional-grade protection at an accessible price point.