1. Introduction
The NETUM NT-2055M is a high-quality desktop barcode reader designed for efficient and accurate scanning of 1D and 2D barcodes. This omnidirectional flatbed QR scanner offers enhanced performance, allowing users to intuitively scan various barcode types, including those that are colorful, damaged, distorted, or reflective. Its compact size makes it suitable for various environments, and its ability to read barcodes from smartphone screens, even in low backlight conditions, provides versatile functionality. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your NT-2055M barcode reader.
2. Package Contents
Please check the package carefully to ensure all items are present and in good condition:
- 1 x NETUM NT-2055M Desktop Barcode Scanner
- 1 x USB Cable
- 1 x User Manual

3. Product Overview
3.1 Key Features
- Strong Decoding Capability: Reads colorful, damaged, distorted, and reflective barcodes.
- Plug and Play: No driver installation required; connects directly via USB.
- Automatic Sleep & Wake-up: Scanner enters sleep mode when idle and automatically wakes up when a barcode is presented.
- Screen Scanning Support: Easily scans 1D, 2D, and QR codes from paper or digital displays (e.g., smartphone screens).
- High Speed Scanning: Decodes at up to 1700 times per second.
- Omnidirectional Scanning: Allows for flexible positioning of items for scanning.
- Durable Design: Certified with CE, ROHS, FCC, IP54, ISO9001.


3.2 Components and Dimensions
The NT-2055M features a compact design with essential components for ease of use.
- Buzzer: Provides audible feedback for successful scans.
- Indicator Light: Displays operational status.
- USB Port: For connecting to a host device.
- Non-slip Base: Ensures stability during operation.

4. Setup Instructions
4.1 Connecting the Scanner
The NT-2055M is designed for plug-and-play operation, requiring no special drivers for most operating systems (Windows, MacOS, Linux).
- Align the USB cable connector with the USB port on the back of the scanner.
- Insert the USB cable firmly into the scanner's port.
- Connect the other end of the USB cable to an available USB port on your computer or host device.
- The scanner will power on and be ready for use.

4.2 Removing the USB Cable
To safely remove the USB cable from the scanner:
- Locate the small hole near the USB port on the scanner.
- Insert a paper clip or a similar thin object into this hole to release the locking mechanism.
- Gently pull the USB cable out of the port.

5. Operating Instructions
5.1 Basic Scanning
Once connected, the NT-2055M operates in an omnidirectional, hands-free mode. Simply present the barcode to the scanner's window. The scanner will automatically detect and decode the barcode.
5.2 Automatic Sleep and Wake-up
The scanner features an intelligent power management system. When not in use for a period, it will automatically enter a low-power sleep mode. To wake it up, simply place a barcode in front of the scanning window, and it will instantly activate and perform the scan.

5.3 Scanning from Screens
The NT-2055M is capable of scanning barcodes displayed on digital screens, such as smartphones, tablets, or computer monitors. Ensure the screen brightness is adequate for optimal scanning performance.
5.4 Scan Modes
The scanner supports both auto scan mode and continuous scan mode. The default mode is typically auto-sensing, where it scans when a barcode is presented. Specific configuration barcodes (usually found in the full user manual) can be used to switch between modes if needed.
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your barcode scanner.
- Cleaning the Scanning Window: Regularly clean the scanning window with a soft, lint-free cloth. For stubborn dirt, slightly dampen the cloth with water or a mild, non-abrasive cleaner. Avoid harsh chemicals or abrasive materials that could scratch the window.
- General Cleaning: Wipe the exterior of the scanner with a soft, dry cloth to remove dust and debris.
- Cable Inspection: Periodically check the USB cable for any signs of wear, cuts, or damage. Replace if necessary.
- Storage: When not in use, store the scanner in a clean, dry environment away from extreme temperatures and direct sunlight.
7. Troubleshooting
If you encounter issues with your NT-2055M barcode reader, refer to the following troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| Scanner not powering on. | USB cable not properly connected or faulty USB port. | Ensure the USB cable is securely connected to both the scanner and the host device. Try a different USB port or a different USB cable. |
| Scanner not reading barcodes. | Barcode is damaged, poorly printed, or not supported. Scanning window is dirty. Incorrect scan mode. | Ensure the barcode is clear and undamaged. Clean the scanning window. Refer to the full manual for advanced configuration barcodes to adjust scan modes or enable/disable specific symbologies. |
| Slow scanning performance. | Environmental lighting conditions. Barcode quality. | Ensure adequate lighting. Try scanning a high-quality barcode. |
| No data transmitted to computer. | Incorrect interface settings (e.g., Virtual COM Port not configured). Application not ready to receive input. | Ensure your application (e.g., notepad, POS software) is active and ready for input. If using RS232 or Virtual COM Port, ensure drivers and settings are correctly configured (refer to the full manual for details). |
8. Specifications
| Feature | Detail |
|---|---|
| Model | NT-2055M |
| Image Sensor | 640 pixels(H) x 480 pixels(V) CMOS |
| Port/Interface | USB (standard), RS232 (optional), Virtual COM Port |
| Supported Symbologies | PDF417, QR Code, Data Matrix, Maxicode, Aztec Code, HanxinCode, MicroQR, Code39, Full ASCII, Codebar, Industrial2of5, Interleave2of5, Matrix2of5, Code93, Code128, Code32, EAN 128, MSI, EAN 8&13, UPCA&E, Plessey |
| Precision | 1D ≥ 5mil, 2D ≥ 7.5mil |
| Depth of Scan Field | 0-270mm |
| Illuminant | 617nm LED |
| Decode Speed | 1700 times/second |
| Light Intensity | 0-86000 Lux |
| Decode Error Rate | Less than 1/8 million |
| Scan Angle | Yaw (Skew) 51°, Pitch 34.5° |
| Voltage | 5V |
| Current | Operation 780mA, Idle 255mA |
| Dimensions (H x W x D) | 145mm x 90mm x 101mm |
| Warranty | 1-Year |
| Certificates | CE, ROHS, FCC, IP54, ISO9001 |
9. User Tips
To get the most out of your NETUM NT-2055M barcode reader, consider the following tips:
- Optimize Scanning Speed: The scanner features a 32-bit CPU for fast and accurate decoding, capable of up to 200 scans per second. For best results, ensure barcodes are presented clearly and steadily.
- Language Support: The scanner supports 25 different languages. If you require specific language instructions (e.g., Spanish, German, French, Italian, Japanese), contact customer service for a PDF manual.
- Customization: The scanner allows for advanced customization, including adding custom prefixes/suffixes, deleting characters, and adding keyboard keys/combinations (such as TAB, CR&LF terminators). These settings can be configured using special barcodes found in the comprehensive user manual.
- Versatile Application: This desktop scanner is suitable for a wide range of environments, including retail stores, supermarkets, warehouses, logistics operations, libraries, and hospitals.
10. Warranty and Support
10.1 Warranty Information
The NETUM NT-2055M Desktop Barcode Reader comes with a 1-Year warranty from the date of delivery, covering manufacturing defects. Please retain your proof of purchase for warranty claims.
10.2 Technical Support
For technical assistance, troubleshooting, or any questions regarding your product, please contact NETUM customer support:
- WhatsApp/WeChat: Jack +86 19074935331 (Replies within 5 minutes)
- Email: 3981883272@qq.com (Replies within 8 hours)
Our professional sales and technical support team are available 24 hours, 7 days a week to assist you.





