LHSYJ 4K Dual Dash Cam Review (2026): A Spec-Based Look

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This lhsyj 4k dual dash cam review covers the M901 model, a front-and-rear recording system designed for comprehensive coverage. It captures 4K video at the front and 2K at the rear, using a Sony STARVIS 2 sensor to handle low-light conditions. The unit includes built-in GPS and a 128GB card. You get a 150-degree front view and a 140-degree rear view. The device connects via 5.8GHz WiFi 6 for fast transfers. This setup aims to provide clear evidence of road events day and night.

• Sony IMX675 STARVIS 2 sensor for improved night vision
• 4K front and 2K rear simultaneous recording at 30fps
• Built-in GPS tracks speed, location, and routes
• 150° front and 140° rear wide-angle lenses
• Includes a free 128GB SD card for storage

Good fit for

You should consider this dash cam if you need high-resolution footage for insurance claims. The 4K front camera captures license plates clearly, while the rear 2K camera covers your blind spots. The included 128GB card means you can start recording immediately without buying extra storage. The built-in GPS is useful if you want to track your driving routes and speed. The wide lenses ensure you capture six lanes of traffic. It suits drivers who want detailed video evidence without setting up external storage first.

Who can skip it

You might want to look elsewhere if you need a dash cam that works without a smartphone app. This unit relies on WiFi 6 for file transfers and settings adjustments. You cannot manage it via a physical remote. Also, the 24-hour parking mode requires an additional hardwire kit, which is not included. If you park in areas with extreme heat for long periods, note that the plastic housing may be less durable than metal alternatives. The lack of a physical remote might also frustrate users who prefer tactile controls.

Verdict

The LHSYJ M901 offers strong 4K front and 2K rear recording with a capable night vision sensor. It is a solid choice for drivers who prioritize video clarity and included storage.

Key specs for this dual cam

Video Resolution: 4K Front + 2K Rear

The front camera records at 3840×2160 pixels, while the rear lens captures 2560×1440 pixels. Both run at 30 frames per second. This high resolution helps you read license plates and spot traffic signs clearly. You get detailed footage for both views, which is useful for insurance claims. Compare this to single-camera units that only offer 1080p, as the extra clarity reduces ambiguity in disputes.

Image Sensor: Sony IMX675 STARVIS 2

This sensor improves light gathering and reduces noise in dark environments. The F1.5 front aperture and F1.8 rear aperture let in more light. You see better details in underground parking or at night. The colors remain vivid even in poor lighting. This is better than standard sensors that produce grainy black-and-white images after dark. It ensures reliable evidence when visibility is low.

Connectivity: WiFi 6, 5.8GHz WiFi

The device uses the newer WiFi 6 standard on a 5.8GHz frequency. This allows faster data transfer to your phone. You can preview and download 4K clips quickly without waiting. The app lets you adjust settings and view GPS data remotely. Faster speeds mean less buffering and smoother playback. This is preferable to older 2.4GHz connections that may lag when handling large video files.

Included Storage: 128GB Card

A 128GB SD card is included to save your recordings. It supports loop recording, which overwrites old files when full. Important collision footage is locked to prevent deletion. This storage size handles hours of 4K video. You do not need to buy a card separately. Compare this to listings that require you to purchase memory separately, as this inclusion simplifies setup and ensures immediate usability.

Camera Configuration: Front and Rear

This dual setup captures video from both the front windshield and the rear window. The front lens has a 150-degree view, and the rear has a 140-degree view. This covers up to six lanes, reducing blind spots. You get comprehensive coverage of your surroundings. Single-lens cameras only record one direction. This configuration is ideal for capturing incidents from both angles, providing a complete picture of the road.

Design and build

The LHSYJ M901 features a piano-black housing with electroplating and oven-baked high-gloss paint. According to the listing, this finish is designed to resist high temperatures inside parked cars, making it suitable for hot climates and long-term parking. The shell is streamlined, which helps it blend into most car interiors without drawing unnecessary attention. You can choose from seven color options, including finishes with lucky star patterns and a four-leaf clover knob. These aesthetic details are intended to match various dashboard styles while maintaining a clean look.

In terms of physical dimensions, the unit measures 3.99 inches in width, 2.91 inches in height, and 1.93 inches in length. It weighs 4.1 ounces, a lightweight profile that reduces strain on your windshield mount. The compact size ensures the front camera does not significantly obstruct your view of the road. The rear camera is separate, allowing for flexible placement to capture the area behind your vehicle.

The device includes a 7-inch IPS HD display panel. According to the listing, this screen provides ultra-wide viewing angles and lifelike colors, staying clear even under intense sunlight. This layout allows you to preview footage and adjust settings directly on the unit. The combination of a sturdy, heat-resistant shell and a clear, responsive display ensures the dash cam remains functional and easy to use in various driving conditions.

Setup and everyday use

Setting up the LHSYJ M901 begins with installing the included 128GB SD card. This card is necessary for storing your 4K front and 2K rear footage. The unit features a 2.5-inch IPS display that provides clear viewing angles. You can use this screen to preview recordings and adjust settings directly on the device. The display is designed to remain readable even under intense sunlight, which helps you verify footage while parked.

For daily management, the dash cam uses built-in 5.8GHz WiFi 6. This connectivity allows you to pair your smartphone with the camera for rapid file transfers. You can preview, download, and playback videos through the companion app without removing the memory card. The app also displays GPS data, including your driving route, current speed, and location history. This makes it easy to share trips or review specific moments from your drive.

In terms of continuous operation, the camera supports seamless loop recording. When the storage fills up, the system automatically overwrites the oldest unprotected files. However, it will lock any footage captured during a collision or when the parking monitor is triggered. To enable 24-hour parking security, you must purchase an extra hardwire kit separately. Without this kit, the device records only while the car engine is running. The loop recording feature ensures you always have space for new drives without manual intervention.

Before You Buy This Dual Cam

You already have the main unit and the 128GB card. The listing notes that an extra hardwire kit is necessary to enable 24-hour parking monitoring. If you want that feature, you must purchase it separately. The device uses built-in GPS to log routes and speed, but you should check if your vehicle’s power outlet supports the required voltage for continuous operation. The housing withstands high temperatures, yet you should still avoid direct sunlight on the IPS display for long periods to preserve the panel. Loop recording handles storage automatically, but you may need to format the SD card occasionally to maintain write speeds. This model fits well alongside other dual-lens options if you prioritize high resolution and night vision. However, if you need cellular connectivity for remote viewing, this Wi-Fi 6 only model will not suffice. Ensure your phone supports the 5.8GHz band for fast downloads. Regularly check the lens glass for smudges to keep the STARVIS 2 sensor performing at its best.

Check before you buy

• Buy a hardwire kit for 24-hour parking mode.
• Verify your car’s power outlet supports continuous use.
• Ensure your phone supports 5.8GHz Wi-Fi connections.
• Check if you need cellular connectivity for remote access.

Specifications side by side

Spec	LHSYJ M901 4K Dual Dash Cam
Camera Configuration	Dual (Front and Rear)
Video Resolution	4K Front + 2K Rear
Image Sensor	Sony IMX675 STARVIS 2
Connectivity	Wi-Fi 6, 5.8GHz Wi-Fi
Included Storage	128GB
Resolution	4K
Recommended Use	Cars
GPS Features	Built-in GPS
Dimensions	1.93 × 3.99 × 2.91 inches
Weight	4.1 ounces
Color	Piano Black
Model	M901

Frequently asked questions

Does the LHSYJ M901 include GPS tracking?

Yes, the LHSYJ M901 features built-in GPS. This allows the system to record your vehicle’s speed and location data directly onto the video files. You can verify your driving route and speed during incidents without needing external devices.

What connectivity options does this dual dash cam offer?

The device supports Wi-Fi 6 and standard Wi-Fi connections. This fast connectivity enables you to transfer large 4K video files to your smartphone quickly. You can review footage and adjust settings via a mobile app without removing the memory card.

Is a memory card included with the purchase?

Yes, the package includes a 128GB SD card. This storage capacity is necessary for recording high-resolution 4K front and 2K rear footage. The included card ensures you have immediate storage for your driving videos upon unboxing and setup.

How does the LHSYJ M901 handle low-light recording?

It uses Sony STARVIS and STARVIS 2 image sensors. These sensors are designed to capture clear video in dark conditions, such as at night or in tunnels. This technology helps maintain visibility of license plates and road details in poor lighting.

What are the physical dimensions of the main unit?

The main unit measures 3.99 inches in width, 2.91 inches in height, and 1.93 inches in length. It weighs 4.1 ounces. These compact dimensions allow it to mount discreetly on your windshield without obstructing your view of the road.

Can this dash cam record from both front and rear cameras simultaneously?

Yes, the LHSYJ M901 is a dual dash cam with front and rear cameras. It records video from both lenses at the same time. This provides comprehensive coverage of your vehicle’s surroundings, capturing events from the front windshield and the rear bumper.

See also

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