1. Introduction
This manual provides detailed instructions for the safe and effective operation of your Teslong Rigid Rifle Borescope Model TSNTG500H. This device is designed for inspecting the interior of rifle barrels, aiding in cleaning regimen evaluation and firearm problem diagnosis. Please read this manual thoroughly before use and retain it for future reference.

Image: The Teslong Rigid Rifle Borescope in use, showing the monitor displaying the bore's interior.
2. Package Contents
Verify that all items listed below are present in your package:
- Teslong NTG500H Rifle Borescope with 5-inch IPS Screen
- Rigid Camera Probe (26-inch long, 0.2-inch diameter)
- Aviation to USB-C Cable
- Aviation to USB-A Cable
- USB-A to USB-C Cable (for charging and data transfer)
- Monitor Stand
- Set of 5 Side-View Mirrors (5mm, 6mm, 7mm, 8.5mm, 10mm)
- 32GB Micro SD Card (pre-installed)
- User Manual (this document)

Image: Overview of the Teslong Borescope components and accessories.
3. Product Overview
3.1. Monitor Features
The 5-inch HD color IPS LCD screen provides a clear view of the inspection area. It features intuitive controls for operation.
- Power Button: Turns the device on/off.
- Mode Button (M): Switches between Photo, Video, and Playback modes.
- OK/Enter Button: Confirms selections.
- Settings Button (Gear Icon): Accesses device settings.
- Lights Button (Sun Icon): Adjusts LED brightness (3 levels) or turns lights off.
- Up/Down Arrows: Navigates menus and adjusts settings.
- USB-C Port: For charging and connecting to a computer.
- Micro SD Card Slot: For storing images and videos (32GB card included).
- Probe Lock: Secures the camera probe connection.
- Speaker: For audio playback.
- Stand Mount: For attaching the monitor stand.
- Reset Button: Resets the device.

Image: The Teslong Borescope monitor highlighting its various buttons and ports.
3.2. Camera Probe Features
The rigid probe is specifically designed for rifle barrel inspection.
- Rigid Tube: 26-inch long for stable insertion.
- Small Diameter: 0.2-inch diameter fits .20 caliber and larger barrels.
- LED Ring Light: Six adjustable LED lights illuminate dark inspection areas.
- Side-View Mirror: Detachable 90° mirror for inspecting barrel walls. Includes various sizes for different calibers.
- Inch Scale: Laser-marked scale on the probe for depth measurement.

Image: The rigid probe of the borescope, illustrating its length and diameter.
4. Setup
- Charge the Monitor: If the battery indicator is low, connect the monitor to a power source using the USB-A to USB-C cable.
- Insert Micro SD Card: Ensure the 32GB Micro SD card is properly inserted into the slot on the bottom of the monitor.
- Connect Probe:
- Thread the Aviation to USB-C cable onto the camera probe.
- Plug the other end of the cable into the probe port on top of the monitor.
- Secure the connection using the probe lock.
- Remove Protective Tip: Carefully remove the black protective tip from the end of the probe.
- Attach Side-View Mirror (Optional): If side-view inspection is required, select the appropriate caliber mirror and carefully screw it onto the threaded end of the probe. Use the lock ring to secure it in place once focus is achieved.
Video: A detailed instruction video on setting up and using the Teslong Rigid Rifle Borescope.
5. Operating Instructions
5.1. Power On/Off
Press and hold the Power Button (green button) for a few seconds to turn the monitor on or off. The Teslong logo will appear, and the probe's ring light will illuminate.
5.2. Mode Switching
Press the Mode Button (M) to cycle through the following modes:
- Photo Mode: For capturing still images.
- Video Mode: For recording video footage.
- Playback Mode: For reviewing captured photos and videos.
5.3. Light Adjustment
Press the Lights Button (Sun Icon) to adjust the brightness of the LED ring light on the probe. There are three brightness levels, and you can also turn the lights off.
5.4. Image and Video Capture
- Ensure the probe is inserted into the barrel and positioned correctly.
- Switch to Photo Mode or Video Mode using the Mode Button (M).
- Press the OK/Enter Button to capture a photo or start/stop video recording. A timecode will appear on the screen when recording video.

Image: The borescope monitor showing a detailed view of a rifle barrel's interior.
5.5. Mirror Installation and Adjustment
The borescope comes with various side-view mirrors to inspect barrel walls. The probe has a fixed focal distance of approximately 10mm for direct viewing. When using a mirror, the focus is adjusted by how far the mirror is threaded onto the probe.
- For smaller caliber barrels (e.g., .22 caliber), position the mirror farther away from the lens.
- For larger caliber barrels (e.g., .30 caliber), move the mirror closer to the lens to achieve sharp focus.
- Use the small lock ring on the threads to secure the mirror in place once the desired focus is achieved.

Image: A selection of removable side-view mirrors for various caliber rifles.
Video: A demonstration of how to attach and adjust the side-view mirrors for optimal focus.
6. Data Transfer
There are two primary methods to transfer photos and videos from your borescope to a computer:
- Direct Connection:
- Connect the monitor to your computer using the provided USB-A to USB-C cable.
- Turn on the monitor. Your computer should recognize the device as a removable drive.
- Navigate to the "DCIM" folder to access your stored photos and videos. You can then drag and drop them to your computer.
- Micro SD Card Reader:
- Carefully remove the Micro SD card from the monitor's slot.
- Insert the Micro SD card into a compatible card reader connected to your computer.
- Access the "DCIM" folder on the card to transfer your files.
7. Maintenance
Proper maintenance ensures the longevity and optimal performance of your borescope:
- Cleaning the Lens and Mirrors: Always clean the camera lens and any attached mirrors before and after each use. Use a soft microfiber cloth and a cotton swab. For stubborn stains, warm water or rubbing alcohol can be used. Do not use stronger solvents as they may damage the lens or mirror coatings.
- Cleaning the Monitor: Wipe the monitor screen and case with a microfiber cloth and a few drops of warm water or rubbing alcohol to remove dust and fingerprints.
- Storage: Store the borescope and its accessories in the provided protective case in a cool, dry place when not in use.
8. Troubleshooting
- Device Not Turning On: Ensure the monitor is fully charged. If the battery indicator is low, connect it to a power source.
- No Image on Screen: Verify that the camera probe is securely connected to the monitor and the probe lock is engaged. Check if the LED lights are on.
- Blurry Image: If using a side-view mirror, adjust its position by threading it closer or farther from the lens until a clear image is achieved. Ensure the lens and mirror are clean.
- Cannot Transfer Files to Computer: Ensure the monitor is turned on when connected to the computer. If it's off, it will only charge. Try using a different USB port or a Micro SD card reader.
- Device Unresponsive: Use a small pin to press the Reset Button located on the back of the monitor.
9. Specifications
| Feature | Specification |
|---|---|
| Model | TSNTG500H |
| Screen Size | 5-inch IPS Display |
| Probe Type | Rigid |
| Probe Length | 26 inches |
| Probe Diameter | 0.2 inches (fits .20 caliber & larger) |
| Video Capture Resolution | 1080p |
| Storage | 32GB Micro SD Card (included) |
| Battery | 1 A battery required (included) |
| Macro Focus Range | 1-10 cm |
| Color | Black |
| Item Weight | 2.29 pounds |
| Package Dimensions | 30.75 x 4.25 x 2 inches |
10. Warranty and Support
Teslong products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the official Teslong website or contact their customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
For additional resources and product information, visit the Teslong Store on Amazon.





