Introduction
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your Prechen HD-340 34-inch WQHD 3440x1440P Touchscreen Monitor. Please read this manual thoroughly before using the product to ensure proper functionality and to prevent damage.
What's in the Box
Upon opening the package, verify that all components listed below are present and undamaged.

Image: Contents of the product box. This image displays the Prechen HD-340 monitor, a USB-C to USB-C cable, a USB-A to USB-B cable, an HDMI to HDMI cable, a DisplayPort (DP) cable, a user manual, and a power adapter.
- Prechen HD-340 34-inch WQHD Touchscreen Monitor
- USB-C to USB-C Cable
- USB-A to USB-B Cable
- HDMI to HDMI Cable
- DisplayPort (DP) Cable
- Power Adapter
- User Manual
Setup Instructions
1. Monitor Assembly
The monitor stand typically comes in multiple pieces. Attach the base to the stand column, then secure the stand column to the back of the monitor. Ensure all screws are tightened securely. Refer to the included quick start guide for specific assembly steps if needed.

Image: Rear view of the monitor, illustrating the connection point for the adjustable stand. The stand allows for height, swivel, and tilt adjustments.
2. Connecting to a Device
The Prechen HD-340 monitor offers multiple connection options. Always connect the power adapter to the monitor first before connecting to your device.

Image: Detailed view of the monitor's rear input/output ports. Labels indicate: 1. HDMI, 2. DP (DisplayPort), 3. USB-C, 4. USB-B, 5. USB-A (x2), 6. 3.5mm Audio, 7. DC Power Input.
Method 1: Full-featured USB-C Connection (for video output and touch)
- Connect the power adapter to the monitor's DC port.
- Connect your device (e.g., laptop, smartphone with full-featured USB-C 3.1) to the monitor's USB-C port using the provided USB-C to USB-C cable. This single cable provides video, audio, and touch functionality.

Image: Illustration of connecting the monitor via a full-featured USB-C cable to a laptop. The power adapter is also shown connected to the monitor.
Method 2: HDMI/DP and USB-A to USB-B Connection (for video output and touch)
- Connect the power adapter to the monitor's DC port.
- Connect your device to the monitor via an HDMI or DisplayPort (DP) cable for video signal.
- To enable touch functionality, connect your device's USB-A port to the monitor's USB-B port using the provided USB-A to USB-B cable.
Note: The touch functionality of this monitor is not available when connected to devices such as Apple devices, PS3/4/5, Nintendo Switch, Xbox, Steam Deck, or Fire TV stick/cube.
3. Power On
After connecting all necessary cables, press the power button on the monitor to turn it on. The power button is typically located on the back or bottom edge of the monitor.
Operating Instructions
1. Touch Functionality
The 34-inch WQHD touchscreen monitor supports 10-point multi-touch, providing an intuitive user experience for various applications.

Image: This image illustrates common touch gestures supported by the monitor, including single touch, enlarge, narrow, drag, multi-touch, scroll up, scroll down, and two-finger touch.
- Basic Gestures: Swipe, zoom (pinch-in/out), drag, and multi-touch inputs are supported.
- Compatibility: Touch functionality is compatible with Windows, Android, and Linux systems that support touch input.
- Limitations: As noted in the setup section, touch functionality is not supported on Apple devices (macOS, iOS), PlayStation, Xbox, Nintendo Switch, Steam Deck, or Fire TV devices.
2. Connecting to Smartphones
For smartphones with a full-featured USB-C port, you can connect directly to the monitor using a USB-C to USB-C cable. This enables both signal transmission and touch functionality.
- Screen Mirroring Mode: Displays your phone's screen directly on the monitor.
- Computer Mode: Some smartphones support a desktop-like interface when connected to an external display.

Image: A smartphone is connected to the monitor via a USB-C cable, demonstrating its capability to display content from mobile devices. The monitor is also connected to power.
3. Ergonomic Adjustments
The monitor features an adjustable stand for optimal viewing comfort.

Image: This diagram illustrates the ergonomic adjustments available: Swivel (-30° to +30°), Height (0-110mm), and Tilt (-5° to +15°).
- Height Adjustment: Adjust the monitor's vertical position to eye level.
- Swivel: Rotate the monitor horizontally to share your screen or adjust your viewing angle.
- Tilt: Adjust the vertical angle of the screen to reduce glare and improve comfort.
4. Picture-by-Picture (PbP) and Picture-in-Picture (PiP)
The monitor supports PbP and PiP functions, allowing you to view multiple sources simultaneously.

Image: The top image shows Picture-by-Picture (PbP) mode, where the screen is split into two halves, displaying different content side-by-side. The bottom image shows Picture-in-Picture (PiP) mode, where a smaller window of content is overlaid on the main screen.
- PbP Function: Separates the screen into two distinct areas, allowing the left and right sides to display different content simultaneously. This is useful for multitasking, such as combining gaming and work.
- PiP Function: Displays a secondary input source in a smaller window on top of the main screen, allowing you to monitor video dynamics without interrupting your primary task.
5. Eye Protection Mode
The monitor includes an eye saver mode with low-blue light and flicker-free technology to minimize harmful blue light and screen flicker, thereby reducing eye strain during extended use.

Image: A close-up of an eye with "eye protection" text, indicating the monitor's feature to reduce eye strain.
Maintenance
1. Cleaning the Screen
- Always power off the monitor and unplug it from the power outlet before cleaning.
- Use a soft, lint-free cloth (e.g., microfiber cloth) slightly dampened with water or a specialized screen cleaner.
- Do not spray liquid directly onto the screen. Apply it to the cloth first.
- Avoid using abrasive cleaners, alcohol, ammonia, or benzene, as these can damage the screen surface.
- Wipe gently in one direction to avoid streaks.
2. Cleaning the Monitor Casing
- Use a soft, dry cloth to wipe dust from the casing.
- For stubborn marks, a slightly damp cloth can be used, followed by a dry cloth.
- Ensure no liquid enters the ventilation openings.
3. Storage
- If storing the monitor for an extended period, disconnect all cables and store it in its original packaging in a cool, dry place.
- Avoid exposing the monitor to extreme temperatures or humidity.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No image on screen |
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| Touch function not working |
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| Flickering or distorted image |
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| No sound from monitor speakers |
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Specifications
| Feature | Detail |
|---|---|
| Model Number | HD-340 |
| Screen Size | 34 Inches |
| Resolution | WQHD 3440 x 1440P |
| Aspect Ratio | 21:9 |
| Refresh Rate | 100Hz |
| Response Time | 2ms |
| Contrast Ratio | 3000:1 |
| Brightness | 350 cd/m² |
| Panel Type | VA Panel |
| Color Gamut | 99% sRGB |
| Connectivity | 1x HDMI, 1x DisplayPort (DP), 1x Full-featured USB-C, 1x USB-B, 2x USB-A, 1x 3.5mm Audio, 1x DC Power Input |
| Touch Functionality | 10-Points Multi-Touch (Windows, Android, Linux compatible) |
| Ergonomics | Height, Swivel, Tilt Adjustable Stand |
| Product Dimensions | 1.96 x 32.28 x 16.53 inches |
| Item Weight | 19.01 pounds |
Warranty Information
Specific warranty details for the Prechen HD-340 monitor are typically provided with the product packaging or can be found on the official Prechen website. Please refer to these sources for the most accurate and up-to-date warranty terms and conditions.
Customer Support
If you encounter any issues or have questions not covered in this manual, please contact Prechen customer support. Contact information can usually be found on the product packaging, the official Prechen website, or through your retailer.





