1. Introduction
The Andonstar AD249SP is a versatile 2160P UHD HDMI Digital Microscope designed for a wide range of applications, including biological observation, PCB/SMD repair, and inspection of various objects like coins and stones. Featuring a 10.1-inch LCD screen and three interchangeable lenses, it offers magnifications up to 4000X when connected to a 27-inch HDMI monitor, providing clear and detailed views of microscopic subjects.

Figure 1: Andonstar AD249SP Digital Microscope with 10.1-inch screen and 32GB SD card.
2. Package Contents
Please check the package carefully to ensure all items are present:
- Microscope ×1
- Lenses (A, B & C) ×3
- Plastic stand ×1
- HDMI cable ×1
- USB Cable ×1
- Dimmer Cable ×1
- IR remote ×1
- Backdrop board ×3
- Observe box ×1
- Tweezers ×1
- Slides kit ×1
- Screw driver ×1
- User manual ×1

Figure 2: Complete package contents of the AD249SP digital microscope.
3. Specifications
| Feature | Specification |
|---|---|
| Material | Plastic |
| Color | Black |
| Screen Size | 10.1 inch |
| Imaging Sensor | 4 mega pixels high definition sensor |
| Video Output | UH-D 2880*2160 24FPS; FH-D 1920*1080 60FPS/30FPS; H-D 1280*720 120FPS |
| Video Format | MP4 |
| Magnification Ratio | 4000X (with 27-inch HDMI monitor) |
| Photo Resolution | Max. 4032*3024 (12M 4032*3024) |
| Photo Format | JPG |
| Frame Rate | Max. 120f/s (under 600 lux brightness & H-DP120) |
| Storage | Micro-SD card, up to 32G |
| PC Support | Yes |
| HDMI Support | Yes |
| Power Source | 5V DC |
| Stand Size | 20cm (W) x 18cm (D) x 33cm (H) |
| Remote Control Battery | 2 * AAA battery (not included) |
Lens Specifications:
| Lens Type | Magnification | Observation Distance | Applications |
|---|---|---|---|
| Lens A | 18X-720X | 12mm-320mm | Whole or part coins, stones, circuit boards, etc. |
| Lens B & C | 1560X-4080X | 3mm-8mm | Microscope slides, fine details. |

Figure 3: Dimensions of the microscope stand.
4. Setup Guide
4.1 Assembly
- Carefully unpack all components from the box.
- Attach the microscope head to the plastic stand, ensuring it is securely fastened.
- Connect the flexible LED lights to the microscope head.
- Insert a Micro-SD card (up to 32GB) into the designated slot on the microscope for storing images and videos.
4.2 Power Connection
Connect the provided 5V DC power adapter to the microscope and plug it into a power outlet.
4.3 External Display Connection (Optional)
The microscope can be connected to an external monitor or PC for a larger viewing experience:
- HDMI Connection: Use the provided HDMI cable to connect the microscope to an HDMI-compatible monitor or TV. Select the correct HDMI input on your external display.
- USB Connection: Use the provided USB cable to connect the microscope to a PC. You may need to install specific software or drivers for full functionality (refer to the included user manual for software details).

Figure 4: Connectivity options for external displays.
4.4 Remote Control Setup
Insert 2 AAA batteries (not included) into the IR remote control. The remote allows for convenient operation without touching the microscope, reducing vibrations.
5. Operating Instructions
5.1 Power On/Off
Press the power button on the microscope or the remote control to turn the device on or off.
5.2 Adjusting Magnification and Focus
- Lens Selection: The AD249SP comes with three lenses (A, B, C). Select the appropriate lens based on your observation needs. Lens A is suitable for lower magnification and longer working distances (e.g., coins, circuit boards), while Lenses B and C offer higher magnification for microscopic slides and fine details.
- Focus Adjustment: Use the focus knob on the microscope to achieve a clear image on the 10.1-inch LCD screen or external display. Adjust the observation distance as needed for each lens.

Figure 5: Microscope with remote control and Lens A for general observation.
5.3 Lighting Control
The microscope features flexible LED lights and a base light. Use the dimmer cable to adjust the brightness of these lights to ensure optimal illumination for your specimen. Proper lighting is crucial for clear image quality.
5.4 Capturing Images and Videos
Once your specimen is in focus and well-lit, you can capture images or record videos:
- Use the dedicated photo/video buttons on the microscope unit or the IR remote control to capture still images (JPG format) or record videos (MP4 format).
- All captured media will be saved to the inserted Micro-SD card.

Figure 6: Observing specimens with Lenses B and C for higher magnification.

Figure 7: Detailed inspection of a coin using the microscope.
Video 1: Demonstration of the microscope displaying a magnified watch mechanism on an external monitor.
6. Maintenance
- Cleaning Lenses and Screen: Use a soft, lint-free cloth specifically designed for optical surfaces to clean the lenses and the LCD screen. Avoid abrasive materials or harsh chemicals.
- General Cleaning: Wipe the microscope body and stand with a dry or slightly damp cloth. Ensure no liquid enters the electronic components.
- Storage: When not in use, store the microscope in a clean, dry, and dust-free environment. Keep it away from direct sunlight and extreme temperatures.
- Handling: Always handle the microscope with care to prevent damage to the optical components and electronic parts.
7. Troubleshooting
7.1 No Image on Screen
- Check if the power adapter is securely connected and the microscope is turned on.
- Ensure the selected lens is properly attached.
- If using an external display, verify the HDMI/USB cable connections and that the external display is set to the correct input source.
7.2 Blurry Image
- Adjust the focus knob slowly until the image becomes clear.
- Ensure the observation distance is appropriate for the selected lens (refer to Lens Specifications in Section 3).
- Adjust the brightness of the LED lights using the dimmer cable to optimize illumination.
- Clean the lens surface if smudges or dust are present.
7.3 Remote Control Not Responding
- Check if the AAA batteries in the remote control are correctly inserted and have sufficient charge.
- Ensure there are no obstructions between the remote control and the microscope's IR receiver.
8. User Tips
- For optimal clarity and detail, always ensure proper lighting and adjust the focus carefully for each lens and specimen.
- When observing very small objects or prepared microscope slides, utilize Lenses B or C for their higher magnification capabilities and shorter working distances.
- For larger objects such as coins, stamps, or circuit boards, Lens A provides a wider field of view and a more comfortable working distance.
- Experiment with the included backdrop boards to enhance contrast and visibility for different types of specimens.
9. Warranty and Support
For any technical assistance, warranty claims, or product-related inquiries, please contact the manufacturer or your point of purchase. Keep your purchase receipt as proof of purchase.





