TOMLOV DM4S Coin Microscope User Manual
Model: DM4S
1. Introduction
The TOMLOV DM4S Coin Microscope is a versatile digital microscope designed for detailed observation, ideal for coin collectors, students, and hobbyists interested in micro-soldering or circuit board repair. It features a 4.3-inch LCD screen for real-time viewing, adjustable LED illumination, and the ability to connect to a PC for a larger display. This manual provides instructions for setup, operation, maintenance, and troubleshooting to ensure optimal use of your device.

Figure 1: TOMLOV DM4S Coin Microscope with included 32GB SD card.
2. Key Features
- 4.3-inch LCD Screen: Provides a crisp, real-time image without lag or delay, enhancing ergonomics and reducing eye/neck strain compared to traditional eyepieces.
- Adjustable LED Illumination: Features 8 built-in lights around the lens and two flexible gooseneck base lights to avoid reflections, especially when observing shiny objects like coins.
- 50-1000X Magnification: Allows for zooming in to observe incredible details within this magnification range. Actual magnification may vary based on screen size and object distance.
- Photo and Video Recording: Capture images and record videos directly to the included 32GB micro-SD card.
- PC Connectivity: Connects to a computer for a larger viewing experience. Compatible with Windows XP/7/8.1/10 using the default 'Windows Camera' app. Not compatible with Mac OS.
- Durable Metal Construction: Built with an aluminum alloy base, stand, and holder for long-term use and stability during tasks like micro-soldering.
- Rechargeable Battery: Equipped with a long-lasting 2000mAh rechargeable and replaceable battery, supporting power bank charging.

Figure 2: The DM4S microscope is capable of saving images and recording videos, suitable for various applications.
3. Package Contents
Please check the package carefully to ensure all items are present:
- 1x Digital Microscope (DM4S unit)
- 1x Aluminum Base
- 1x Holder/Stand
- 1x USB Cable
- 1x User Manual
- 1x 32GB micro-SD Card

Figure 3: Contents of the DM4S package.
4. Setup Instructions
4.1 Assembly
- Attach the microscope unit to the holder/stand. Secure it firmly using the adjustment knob.
- Insert the holder/stand into the aluminum base.
- Connect the two flexible gooseneck LED lights to the designated ports on the aluminum base.
4.2 Powering On
- Ensure the microscope's internal 2000mAh battery is charged. If not, connect the microscope to a power source using the provided USB cable. It can be charged via a wall adapter (not included) or a power bank.
- Press and hold the power button on the microscope unit to turn it on. The 4.3-inch LCD screen should illuminate.
4.3 Inserting the Micro-SD Card
- Locate the micro-SD card slot on the side of the microscope unit.
- Gently insert the included 32GB micro-SD card into the slot until it clicks into place. This card is essential for saving photos and videos.
5. Operating Instructions
5.1 Basic Observation (LCD Mode)
- Place the object you wish to observe on the aluminum base directly under the microscope lens.
- Adjust the height of the microscope unit using the stand's adjustment knob to get a rough focus.
- Use the focus wheel on the microscope lens for fine-tuning the focus until the image on the LCD screen is clear.
- Adjust the magnification between 50X and 1000X as needed.
5.2 Adjusting Illumination
The DM4S features both built-in LED lights around the lens and two flexible gooseneck side lights.
- Use the brightness control buttons on the microscope unit to adjust the intensity of the built-in 8 LED lights.
- The two gooseneck side lights can be manually positioned and adjusted to illuminate the object from different angles, helping to avoid reflections, especially on shiny surfaces like coins.

Figure 4: Adjusting the gooseneck lights and brightness for optimal viewing.
5.3 Taking Photos and Recording Videos
With the micro-SD card inserted, you can capture observations:
- To take a photo: Press the 'OK' button (or designated photo button) on the microscope unit. Photos are saved in JPG/BMP format.
- To record a video: Press the 'Menu' button (or designated video button) to switch to video mode, then press 'OK' to start/stop recording. Videos are saved in AVI format.
5.4 PC Connection (Larger View)
For a larger viewing experience, connect the microscope to a Windows PC:
- Connect the microscope to your Windows computer using the provided USB cable.
- Turn on the microscope.
- On your Windows PC (XP, 7, 8.1, 10), open the default 'Windows Camera' application. No additional software download is required.
- The microscope's feed should appear on your computer screen. Note: This feature is not compatible with Mac OS.

Figure 5: Connecting the DM4S to a PC for a larger view.
6. Maintenance
6.1 Cleaning
- Lens: Use a soft, lint-free cloth specifically designed for optical lenses to gently wipe the lens. For stubborn smudges, a small amount of lens cleaning solution can be applied to the cloth (not directly to the lens).
- Body: Wipe the microscope body and stand with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
6.2 Battery Care
- To prolong battery life, avoid fully discharging the 2000mAh battery frequently.
- If storing the microscope for an extended period, charge the battery to about 50% and store it in a cool, dry place.
- The battery is replaceable; if performance degrades significantly, contact customer support for replacement options.
6.3 Storage
Store the microscope in a clean, dry environment away from direct sunlight, extreme temperatures, and high humidity. Keep it covered to prevent dust accumulation.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Microscope does not power on | Low battery; Power button not pressed correctly | Charge the battery using the USB cable; Press and hold the power button for a few seconds. |
| No image on LCD screen | Microscope not powered on; Lens cap on; Object not in focus; Insufficient lighting | Ensure power is on; Remove lens cap; Adjust focus wheel and stand height; Turn on/adjust LED lights. |
| Image is blurry or unclear | Incorrect focus; Object too far/close; Dirty lens | Adjust focus wheel and stand height; Clean the lens. |
| Reflections on shiny objects | Direct lighting angle | Adjust the angle of the flexible gooseneck side lights to minimize glare. |
| Cannot save photos/videos | No micro-SD card inserted; SD card full or corrupted | Insert the 32GB micro-SD card; Format or replace the SD card. |
| PC connection not working | Incorrect OS; USB cable issue; Wrong application | Ensure using Windows OS (not Mac OS); Try a different USB port/cable; Use 'Windows Camera' app. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | DM4S (also referred to as DM4) |
| Screen Size | 4.3 inch high screen |
| Sensors | High performance optical wafers |
| Main Control Chip | Special master control 16Bit DSP |
| Biggest Pixel | 1080P |
| Lens Optical Size | 1/6.5" |
| Photo Resolution | VGA; 1.3M; 2M; 3M |
| Video Resolution | VGA; 720P; 1080P |
| Data Format | JPG/AVI |
| Focus Mode | Manual operation |
| Picture Format | JPG/BMP |
| Magnification Times | 50-1000X |
| Light Source | 8 LED lights (adjustable brightness) + 2 side lights |
| Focus Range | 10~40mm |
| PC Resolution & Transfer Rate | 640*480/26fps, 1280*720/26fps |
| White Balance | Automatic |
| Exposure | Automatic |
| PC Operating System | Windows XP, 7, 8.1, 10 (Not compatible with Mac OS) |
| Supported Languages | 12 languages (English, Simplified Chinese, Traditional Chinese, Portuguese, Japanese, French, German, Korean, Italian, Netherlands, Russia, Spain, Arabic) |
| Lens Structure | 2G+IR |
| Aperture | F4.5 |
| Lens Perspective | 16° |
| Interface | Micro USB 2.0 |
| Operating Temperature | -20°C ~ +60°C |
| Working Humidity | 30%~85%Rh |
| Operating Current | 330mA |
| Power Consumption | 1.65W |
| Color | Black |
| Item Size | 16*12*6.5cm |
| Battery Capacity | 2000mAh |
| Storage | 32GB micro-SD Card (included) |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the specific warranty card included with your product or contact the seller/manufacturer directly. Keep your purchase receipt as proof of purchase.





