1. Introduction
Thank you for choosing the LECTRUS D2B 4K Dash Cam. This device is designed to provide high-resolution video recording for your vehicle, enhancing driving safety and providing crucial evidence in case of incidents. Featuring front and rear cameras, advanced night vision, G-Sensor collision detection, 24-hour parking monitoring, and Wi-Fi connectivity, this dash cam offers comprehensive protection and convenience.
2. Safety Information
- Do not operate the dash cam or access its settings while driving. Always pull over safely before making any adjustments.
- Ensure the dash cam is securely mounted and does not obstruct your view of the road or interfere with airbag deployment.
- Use only the provided power adapter and cables to prevent damage to the device or your vehicle.
- Avoid exposing the dash cam to extreme temperatures or direct sunlight for prolonged periods, as this may affect its performance and lifespan.
- Keep the lens clean to ensure clear video recordings.
- Regularly back up important video files to prevent accidental loss.
3. Package Contents
Please check the box for the following items:
- LECTRUS D2B Dash Camera (Front Unit)
- Rear Camera (11.5 ft cable)
- Suction Cup Mount
- 64GB SD Card (pre-inserted)
- SD Card Reader
- Car Charger (11.5 ft cable)
- User Manual

Figure 3.1: Package Contents
4. Product Overview
The LECTRUS D2B Dash Cam features a compact design with a 3-inch IPS screen for easy viewing and navigation. It includes a front camera for 4K recording and a rear camera for 1080P recording, ensuring comprehensive coverage.

Figure 4.1: LECTRUS D2B Dash Cam Overview

Figure 4.2: Key Features

Figure 4.3: Feature Icons
5. Setup
5.1 SD Card Installation and Formatting
- Ensure the dash cam is powered off.
- Insert the provided 64GB SD card into the SD card slot until it clicks into place. The card is pre-inserted for convenience.
- Power on the dash cam.
- Navigate to the system settings and select 'Format SD Card'. Confirm to format the card. This prepares the card for optimal performance with the dash cam.
5.2 Front Camera Installation
- Clean the windshield area where you intend to mount the dash cam.
- Attach the suction cup mount to the dash cam.
- Press the suction cup firmly against the windshield and flip the lever to secure it.
- Adjust the angle of the front camera to ensure a clear view of the road ahead.
5.3 Rear Camera Installation
- Mount the rear camera on the rear windshield, ensuring it has a clear view.
- Route the rear camera cable neatly along the vehicle's interior trim to the front dash cam unit.
- Connect the rear camera cable to the designated port on the main dash cam unit.

Figure 5.1: Installation Diagram
5.4 Power Connection
- Plug the car charger into your vehicle's cigarette lighter socket.
- Connect the other end of the car charger cable to the dash cam's power input port.
- The dash cam will automatically power on and begin recording when your vehicle starts.
6. Operating Instructions
6.1 Basic Operation
- Power On/Off: The dash cam automatically powers on/off with your vehicle's ignition. You can also manually power it on/off by pressing and holding the power button.
- Recording: Once powered on, the dash cam automatically starts loop recording. A red 'REC' icon will be visible on the screen.
- Screen Display: The 3-inch IPS screen displays live footage from the front and rear cameras. You can switch between views or turn off the screen to save power while recording continues.
6.2 Loop Recording
The dash cam records video in continuous loops (e.g., 1, 3, or 5-minute segments). When the SD card is full, the oldest unlocked video files will be overwritten automatically to make space for new recordings.

Figure 6.1: Loop Recording Explained
6.3 G-Sensor (Collision Detection)
The built-in G-Sensor detects sudden impacts or collisions. When triggered, it automatically locks the current video segment, preventing it from being overwritten by loop recording. This ensures critical footage is preserved as evidence.

Figure 6.2: G-Sensor in Action
6.4 24-Hour Parking Mode
With an optional ACC hardwire kit (not included), the dash cam can monitor your vehicle even when parked. If a collision or impact is detected, the dash cam will automatically wake up and record a short video, providing protection against theft or vandalism.
6.5 Night Vision
Equipped with high-sensitivity sensors and infrared filters, the dash cam provides clear video recordings in low-light conditions, ensuring visibility and security during nighttime driving or in dark parking lots.

Figure 6.3: Enhanced Night Vision

Figure 6.4: Powerful Night Vision Features
6.6 Wi-Fi Connectivity and APP Control
The dash cam supports Wi-Fi connectivity, allowing you to wirelessly transfer video files to your smartphone or computer. Download the dedicated app (scan the QR code in the instruction manual) to view live footage, playback recordings, and manage settings directly from your mobile device.

Figure 6.5: App Connectivity

Figure 6.6: Share Footage via App
6.7 Viewing Footage on PC
You can easily view recordings on your computer using the included high-speed USB 3.0 SD card reader. Simply remove the SD card from the dash cam and insert it into the reader, then connect to your PC (compatible with both Windows and Mac systems).

Figure 6.7: PC Viewing with Card Reader
6.8 Official Product Video
Video 6.1: LECTRUS K02 Triple Channels Dash Cam Overview. This video provides a visual demonstration of the dash cam's features, including its 3.1 HD screen, 6-layer lens, wireless transmission and control, wide-angle coverage (Front 170°, Cabin 150°, Rear 150°), 2.5K 30fps high resolution, powerful night vision, built-in G-Sensor for intelligent collision detection and automatic video locking, loop recording, and 24-hour parking mode.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the dash cam's body and lenses. Do not use abrasive cleaners or solvents.
- SD Card Care: For optimal performance, it is recommended to format the SD card once a month. This helps prevent data corruption and ensures smooth recording. Replace the SD card if you notice any issues with recording or file integrity.
- Firmware Updates: Check the LECTRUS official website periodically for any available firmware updates to ensure your dash cam has the latest features and bug fixes.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Dash cam not powering on. | No power from car charger; faulty cable; low internal battery. | Check car charger connection and vehicle's cigarette lighter. Try a different USB cable/charger. Charge the internal battery. |
| Recording stops or freezes. | SD card error; full SD card; slow SD card. | Format the SD card. Use a high-speed (Class 10 or U3) SD card. Replace the SD card if issues persist. |
| Poor video quality. | Dirty lens; protective film on lens; incorrect resolution settings. | Clean the lens. Remove any protective film. Check video resolution settings in the menu. |
| Wi-Fi connection issues. | Incorrect Wi-Fi password; app not updated; interference. | Ensure correct Wi-Fi password. Update the app to the latest version. Try connecting in a different location. |
| Parking mode not working. | No hardwire kit installed; parking mode setting off. | Parking mode requires an ACC hardwire kit (not included). Ensure parking mode is enabled in settings. |
9. Specifications
| Feature | Description |
|---|---|
| Model | D2B |
| Front Camera Resolution | 4K (30FPS) |
| Rear Camera Resolution | 1080P |
| Screen Size | 3-inch IPS Screen |
| Lens Angle (Front) | 170° Ultra-Wide Angle |
| Lens Angle (Rear) | 150° Wide Angle |
| Storage | Supports up to 256GB Micro SD Card (64GB included) |
| Video Encoding | H.264/H.265 |
| Connectivity | 5G Wi-Fi, USB |
| Special Features | G-Sensor, 24H Parking Mode (requires hardwire kit), Loop Recording, Night Vision, APP Control |
| Power Source | Super Capacitor (for stable operation in extreme temperatures), Built-in 300mAh battery |
| Dimensions | 1 x 1 x 1 inches |
| Weight | 14 ounces |

Figure 9.1: Wide Angle Coverage

Figure 9.2: Quality and Durability
10. Warranty and Support
LECTRUS provides a standard warranty for this product. Please refer to the warranty card included in your package for specific terms and conditions. For technical support, troubleshooting assistance, or warranty claims, please contact LECTRUS customer service through the contact information provided in your product packaging or visit the official LECTRUS website.
For additional support and product information, you can visit the LECTRUS Store on Amazon.





