1. Introduction
This manual provides comprehensive instructions for the DXZtoz 3.9mm Articulating Borescope, Model AGC900D-3.9mm. This precision inspection tool is designed for detailed visual examination in confined and hard-to-reach areas. It is suitable for a wide range of applications, including aircraft and automotive engine inspection, industrial machinery maintenance, and general household diagnostics. Please read this manual thoroughly before operating the device to ensure proper use and to maximize its lifespan.
2. What's in the Box
Upon unpacking, verify that all the following components are present:
- DXZtoz Articulating Borescope Unit
- USB-C Data/Charging Cable
- User Manual
- 32GB Micro SD Card (pre-installed or included separately)
- Carrying Case
- Cleaning Wipes (for probe and screen)

Image: All components included in the DXZtoz Articulating Borescope package.
3. Key Features
3.1. 3.9mm Ultra-Slim Probe with 220° Two-Way Articulation
The borescope features an ultra-slim 3.9mm diameter probe, allowing access to extremely small openings that larger borescopes cannot reach. The probe offers 220° two-way articulation, enabling precise navigation and viewing around corners and obstacles within inspection areas. This flexibility is crucial for comprehensive internal inspections.

Image: Illustration of the probe's 220° two-way articulation.

Image: Size comparison demonstrating the advantage of the 3.9mm ultra-slim probe.
3.2. 5-inch IPS HD Screen
Equipped with a large 5-inch IPS HD screen, the device provides a clear and vivid display of the inspection area. The IPS technology reduces light reflection and offers a wider viewing angle, ensuring that details are easily visible, even in challenging lighting conditions. This larger screen size offers 30% clearer details compared to smaller displays.

Image: The 5-inch IPS HD screen displaying an inspection view.
3.3. Optimal Focal Range and 1080P Definition
The inspection camera lens is optimized for a close focal range of approximately 1cm, allowing for detailed examination of small defects, cracks, and features. It captures true 1080P definition video and images, providing high-resolution visuals for accurate diagnosis. A 10X digital zoom function further enhances the ability to inspect fine details.

Image: Illustration of the borescope's focal range and lens capabilities.
3.4. Durable Stainless Steel Probe
The 5-foot flexible probe is constructed from premium stainless steel, offering enhanced durability and resistance to wear compared to standard gooseneck cables. It is heat-resistant up to 60°C, making it suitable for demanding industrial environments and prolonged use.

Image: The durable stainless steel probe design.
3.5. Adjustable LED Lights and IP67 Waterproofing
The probe tip integrates 6 adjustable LED lights, providing ample illumination for dark inspection areas. The brightness can be adjusted to suit various conditions. The probe is IP67 waterproof, allowing for safe operation in wet or submerged environments without damage.

Image: Adjustable LED lights and IP67 waterproof feature.
3.6. Photo & Video Recording with 32GB Storage
The device supports taking still photos and recording videos with sound. All media files are stored on the included 32GB memory card, which can be easily transferred to a computer for further analysis or sharing.
3.7. Long Battery Life
A built-in 3000mAh rechargeable battery provides 5-6 hours of continuous working time, ensuring sufficient power for most inspection tasks. The device can be conveniently charged via a power bank for extended outdoor use.
4. Setup
- Charge the Device: Before first use, fully charge the borescope using the provided USB-C cable and a compatible power adapter (not included). The charging indicator will show progress.
- Insert Micro SD Card: Ensure the 32GB Micro SD card is correctly inserted into the designated slot on the device. This card is essential for saving photos and videos.
- Power On: Press and hold the power button (usually located on the side or top of the main unit) for a few seconds until the screen illuminates.
- Adjust Probe: Gently uncoil the probe from its storage position. Avoid sharp bends or excessive force.
5. Operating Instructions
5.1. Basic Controls
- Power Button: Press and hold to turn the device ON/OFF.
- OK Button: Confirms selections in menus or takes a photo/starts video recording in live view.
- Up/Down Arrows: Navigate menus, adjust zoom, or control LED brightness.
- Menu Button: Access device settings.
- Mode Button: Switch between photo and video modes.
5.2. Articulating the Probe
Use the articulation control wheel or lever (typically located near the handle) to bend the probe tip. Gently rotate or push the control to achieve the desired angle. The 220° two-way articulation allows for precise positioning of the camera lens.
5.3. Adjusting LED Brightness
In live view, use the dedicated LED brightness control buttons or the Up/Down arrows (as per specific model interface) to increase or decrease the illumination from the probe tip. Adjust for optimal visibility in varying light conditions.
5.4. Taking Photos and Recording Videos
- Photo Mode: Select photo mode using the Mode button. Press the OK button to capture a still image.
- Video Mode: Select video mode using the Mode button. Press the OK button once to start recording and again to stop.
5.5. Zoom Function
While in live view, use the designated zoom buttons (often the Up/Down arrows or separate buttons) to digitally zoom in or out up to 10X. Note that digital zoom magnifies the existing image and may reduce clarity at higher levels.
6. Maintenance
- Cleaning the Probe: After each use, especially in dirty or wet environments, gently wipe the probe and camera lens with a soft, damp cloth or the provided cleaning wipes. Ensure no debris obstructs the lens or LED lights.
- Cleaning the Screen: Use a soft, lint-free cloth to clean the display screen. Avoid abrasive materials or harsh chemicals.
- Storage: Store the borescope and its accessories in the provided carrying case in a cool, dry place, away from direct sunlight and extreme temperatures. Ensure the probe is coiled loosely to prevent damage.
- Battery Care: To maintain battery health, avoid fully discharging the device frequently. Recharge the battery regularly, even if not in use for extended periods.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low battery; Device malfunction | Charge the battery fully. If problem persists, contact support. |
| No image on screen | Probe disconnected; Camera fault | Ensure probe is securely connected. Restart device. If problem persists, contact support. |
| Poor image quality / Blurry image | Dirty lens; Incorrect focal distance; Insufficient lighting | Clean the camera lens. Adjust the probe's distance to the object (optimal 1-10cm). Increase LED brightness. |
| Cannot save photos/videos | No SD card; SD card full; SD card error | Ensure SD card is inserted. Check available space. Format SD card (backup data first) or try a different card. |
| Probe articulation not working | Mechanism obstruction; Internal fault | Check for physical obstructions. Do not force articulation. Contact support if mechanism feels jammed. |
For issues not listed here or if solutions do not resolve the problem, please refer to the full user manual or contact DXZtoz customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | AGC900D-3.9mm |
| Probe Diameter | 3.9mm |
| Articulation | 2-Way, 220° |
| Screen Size | 5 inches IPS HD |
| Video Capture Resolution | 1080p |
| Effective Still Resolution | 1080 pixels |
| Macro Focus Range | 1 cm (optimal 1-10cm) |
| Digital Zoom | 10x |
| LED Lights | 6 adjustable LEDs |
| Water Resistance Level | IP67 (probe) |
| Battery Capacity | 3000mAh |
| Battery Average Life | 5-6 hours |
| Storage | 32GB Micro SD card (included) |
| Probe Material | Premium Stainless Steel |
| Heat Resistance (Probe) | Up to 60°C |
| Item Weight | 2.7 pounds |
9. Warranty and Support
The DXZtoz Articulating Borescope comes with the following warranty:
- 7-Days: No reason return and money back, provided the product is in full new condition.
- 30-Days: Product replacement for defects.
- 12-Months: Quality-related warranty.
For technical support, warranty claims, or any inquiries, please contact DXZtoz customer service through the retailer where the product was purchased or visit the official DXZtoz website for contact information.
10. Product Videos
The following videos provide additional visual guidance and demonstrations of the DXZtoz Articulating Borescope's features and capabilities.
DXZtoz borescope - What makes it better than the rest
Video: An overview highlighting the superior features and design of the DXZtoz borescope compared to other models.
DXZtoz borescope, amazing picture quality & depth of field
Video: Demonstrates the high picture quality and excellent depth of field achievable with the DXZtoz borescope during inspections.
Very Useful Tool
Video: A short demonstration showcasing the practical utility of the borescope in various inspection scenarios.
Great quality
Video: Highlights the overall quality and performance of the DXZtoz borescope.
