1. Introduction
Thank you for choosing the MNN 4K Portable Monitor. This user manual provides comprehensive instructions for setting up, operating, maintaining, and troubleshooting your new portable display. Please read this manual thoroughly before use to ensure optimal performance and longevity of your device.
2. Product Overview
2.1 Key Features
- 4K Ultra HD Resolution: 3840x2160 UHD IPS panel for crisp, immersive images with incredible detail and clarity.
- High Refresh Rate & HDR: 60Hz refresh rate and HDR technology for unparalleled contrast and accurate color reproduction.
- Exceptional Color Accuracy: 100% Adobe RGB wide color gamut, 400 nits brightness, 1200:1 contrast ratio, and 178° viewing angle.
- Versatile Connectivity: Dual USB-C 3.1 full-function ports, Mini-HDMI port, and a 3.5mm headphone interface.
- Ultra-Portable Design: Only 0.3 inches ultra-slim profile and weighs 1.4 lbs, ideal for travel and on-the-go use.
- Multiple Display Modes: Supports landscape and portrait modes, and various scene modes (text/movie/game), with duplicate/extend/second screen options.
2.2 Package Contents
Upon unboxing, please ensure all the following items are included:
- MNN 4K Portable Monitor
- USB-C to USB-C Cable
- USB-C to USB-A Cable
- Mini-HDMI to HDMI Cable
- Smart Cover (Two-angle)
- Wall Charger (Fast-charge)
- User Manual (This guide)

Figure 1: Included Packaging Accessories
2.3 Monitor Components and Ports
Familiarize yourself with the monitor's layout and connection points:

Figure 2: Monitor Ports and Controls
- Power Button: Press and hold to turn the monitor on or off.
- Power Indicator Light: Indicates power status.
- Multi-function Key: Used to navigate the On-Screen Display (OSD) menu and adjust settings.
- 3.5mm Headphone Jack: For connecting external audio devices.
- Mini HDMI Port: For video input from devices with HDMI output.
- Type-C (Full Function) Ports (x2): Supports power delivery, video transmission (DisplayPort Alt Mode), and data transfer with a single cable.
3. Setup
3.1 Connecting to Devices
Your MNN portable monitor offers flexible connectivity options:
- USB-C Connection: For devices with a full-function USB-C port (supporting DisplayPort Alt Mode and Power Delivery), use a single USB-C to USB-C cable for both video and power.
- HDMI Connection: For devices with an HDMI port, use the Mini-HDMI to HDMI cable for video. You will also need to connect a USB-C to USB-A cable to a power source (e.g., wall charger or laptop USB-A port) for power.
- Note for Phone Connection: When connecting the 4K portable display to a phone, ensure sufficient power is supplied. Additional power may be required via the second USB-C port or the wall charger.

Figure 3: Easy Connection Options
3.2 Using the Smart Cover
The included smart cover protects your monitor and doubles as a versatile stand:
- To use as a stand, fold the cover along its creases to form a triangular support.
- The magnetic strip on the cover will attach to the back of the monitor, holding it securely in place.
- Adjust the folding position to achieve different viewing angles (two-angle support).

Figure 4: Smart Cover as a Stand
4. Operating Instructions
4.1 Power On/Off
- To power on, connect the monitor to a power source and press the Power Button.
- To power off, press and hold the Power Button until the screen turns off.
4.2 OSD Menu Navigation
The On-Screen Display (OSD) menu allows you to adjust various settings:
- Press the Multi-function Key to open the OSD menu.
- Use the Multi-function Key (or dedicated navigation buttons if present) to navigate through menu options.
- Press the Multi-function Key again to select an option or confirm a setting.
- Common adjustable settings include brightness, contrast, color temperature, input source, and display modes.
4.3 Display Modes
The monitor supports various display configurations to suit your needs:
- Duplicate Mode: Displays the same content on both your primary device and the portable monitor.
- Extend Mode: Extends your desktop across both screens, providing more workspace.
- Second Screen Only Mode: Displays content only on the portable monitor, turning off your primary device's screen.
These modes can typically be configured through your operating system's display settings (e.g., Windows Display Settings, macOS System Preferences).

Figure 5: Work More Efficiently with Extended Display
4.4 Orientation
The monitor can be used in both landscape and portrait orientations:
- Landscape Mode: Standard horizontal orientation, ideal for movies, games, and general computing.
- Portrait Mode: Vertical orientation, useful for coding, document viewing, and web browsing.
To switch orientations, adjust the monitor's physical position and then change the display settings in your connected device's operating system.

Figure 6: Landscape and Portrait Mode
4.5 Gaming Console Connectivity
The MNN portable monitor is compatible with various gaming consoles, including Xbox, PlayStation (PS4/PS5), and Nintendo Switch, providing an enhanced gaming experience on the go.

Figure 7: Gaming with MNN Portable Monitor
5. Maintenance
5.1 Cleaning the Monitor
- Always power off and unplug the monitor before cleaning.
- Use a soft, lint-free cloth lightly dampened with water or a non-abrasive screen cleaner.
- Do not spray liquid directly onto the screen or into any openings.
- Avoid using harsh chemicals, alcohol, or abrasive materials.
5.2 Storage
When not in use, store your MNN portable monitor in a cool, dry place, away from direct sunlight and extreme temperatures. Utilize the smart cover to protect the screen from scratches and dust during storage and transport.

Figure 8: Portable Design for Easy Storage
6. Troubleshooting
6.1 Common Issues and Solutions
| Issue | Possible Cause | Solution |
|---|---|---|
| No Signal / Black Screen | Incorrect input source selected, loose cable connection, insufficient power, device not outputting signal. | Check all cable connections. Ensure the correct input source is selected in the OSD menu. Verify your device is configured to output to an external display. Ensure the monitor is receiving adequate power, especially for 4K resolution or phone connections. |
| Flickering Screen | Cable quality, refresh rate mismatch, power fluctuations. | Try a different cable. Adjust the refresh rate on your connected device. Ensure a stable power supply. |
| No Power | Power cable not connected, faulty power adapter, insufficient power from source. | Verify power cable is securely connected to both the monitor and the power outlet. Try a different power outlet or adapter. Ensure the power source provides enough wattage for the monitor. |
| Image is too Dark/Bright | Brightness/Contrast settings. | Adjust brightness and contrast settings via the OSD menu. |
7. Specifications
7.1 Technical Specifications
| Feature | Detail |
|---|---|
| Screen Size | 15.6 Inches |
| Resolution | 3840 x 2160 (4K UHD 2160p) |
| Panel Type | IPS |
| Aspect Ratio | 16:9 |
| Image Brightness | 400 nits |
| Contrast Ratio | 1200:1 |
| Viewing Angle | 178° |
| Color Gamut | 100% Adobe RGB |
| Connectivity | 2x USB-C (Full Function), 1x Mini HDMI, 1x 3.5mm Audio Jack |
| Product Dimensions | 0.3 x 14.48 x 8.85 inches |
| Item Weight | 1.8 pounds |
| Manufacturer | MNN |
| Model Number | MNN 4K Portable Monitor |
8. Warranty and Support
8.1 Warranty Information
MNN offers a manufacturer's warranty for this product. Upon registration with the manufacturer, you may be eligible for an extended protection period, typically up to 2 years. Please refer to the warranty card included in your package or visit the official MNN website for detailed warranty terms and conditions.
8.2 Customer Support
For any questions, technical assistance, or support inquiries, please contact MNN customer service through the contact information provided on the official MNN website or your purchase platform. You can also refer to the official User Guide (PDF) available online for more detailed information: MNN 4K Portable Monitor User Guide (PDF).





