1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your new Head-Up Display (HUD). This device projects essential driving information onto your windshield, allowing you to monitor vehicle data without diverting your attention from the road. It features a high-definition display, multiple functions, and a simple plug-and-play setup.

Image 1: The Head-Up Display unit projecting speed and other vital information onto a transparent screen.
Key Features:
- HD Display: Bright and easy-to-read projection, maintaining clarity in various lighting conditions.
- Multifunctionality: Displays speed, clock, voltage, altitude, satellite number, driving distance, driving time, and compass. Includes overspeed and voltage alerts.
- Integrated GPS Module: Provides real-time data for speed, direction, mileage, and time.
- Plug-and-Play Installation: Simple setup with a USB connection, no drilling or permanent modifications required.
- Automatic Operation: Powers on automatically with the engine and off when the car is turned off.
- Compact Design: Integrates seamlessly with most dashboards.
2. Setup and Installation
The Head-Up Display is designed for straightforward installation. Follow these steps to set up your device:
- Choose Placement: Select a suitable flat area on your dashboard where the HUD can sit stably and project clearly onto your windshield without obstructing your view. The unit features an anti-slip base to ensure stability during driving.
- Connect Power: Use the provided USB cable to connect the HUD to your vehicle's USB port or a compatible 5-24V car charger. The device is plug-and-play and will power on automatically when the car engine starts.

Image 2: Connecting the Head-Up Display via USB cable for power supply.
- Adjust Display Angle: The projection angle is adjustable. Position the transparent display panel to achieve the most comfortable and clear viewing angle for the projected information.
- Verify Display: Once powered on, the HUD will automatically display information. Ensure the display is clear and visible. This model features a 3D reflection display that does not require a separate reflection film.

Image 3: The 3D reflection display technology of the HUD, providing clear visuals without additional film.
Product Dimensions:
Understanding the dimensions can assist in optimal placement on your dashboard.

Image 4: Detailed view of the HUD unit with its dimensions and control buttons labeled.

Image 5: Another perspective of the HUD, highlighting the display board, screen, and setting buttons.
3. Operating Instructions
The HUD automatically activates and deactivates with your vehicle's ignition. It provides various display modes and alerts to enhance your driving experience.
Display Functions:
The HUD can display a range of information, including:

Image 6: Visual representation of the HUD's core functions: Speed, Clock, Voltage, Altitude, Satellite Number, Driving Distance, Driving Time, and Compass.
- Speed: Current vehicle speed (KMH or MPH, depending on model).
- Clock: Real-time clock.
- Voltage: Vehicle battery voltage.
- Altitude: Current altitude.
- Satellite Number: Number of GPS satellites detected.
- Driving Distance: Distance traveled during the current trip.
- Driving Time: Duration of the current trip.
- Compass: Direction of travel.
- Alerts: Overspeed warning and low voltage warning.
Switching Display Modes:
The device offers 8 different display interfaces that can be switched to show various combinations of data. Refer to the 'Setting button' or 'Wave button' on the unit (as shown in Image 4 and 5) to cycle through these modes.

Image 7: Examples of the eight customizable display modes, combining speed with other data like compass, clock, driving time, voltage, and altitude.
4. Maintenance
To ensure the longevity and optimal performance of your HUD, follow these simple maintenance guidelines:
- Cleaning: Use a soft, dry, or slightly damp cloth to clean the display screen and the unit's exterior. Avoid abrasive cleaners, solvents, or harsh chemicals that could damage the surface.
- Avoid Obstructions: Ensure no objects are placed on top of the unit or blocking the projection area on the windshield, as this can impair visibility.
- Temperature: Do not expose the device to extreme temperatures for prolonged periods.
5. Troubleshooting
If you encounter issues with your Head-Up Display, refer to the following common troubleshooting steps:
- No Power/Display:
- Check the USB cable connection to both the HUD and the vehicle's power source. Ensure it is securely plugged in.
- Verify that the vehicle's ignition is on. The HUD powers on automatically with the engine.
- Try a different USB port or power adapter if available.
- Inaccurate Speed Reading:
- Ensure the HUD has a clear view of the sky to receive GPS signals. Obstructions can affect accuracy.
- Allow a few moments for the GPS module to acquire sufficient satellite signals after startup.
- Display Not Clear/Flickering:
- Adjust the angle of the transparent display panel.
- Clean the display panel and your windshield to remove any dust or smudges.
- Ensure no strong light sources are directly hitting the display panel, causing glare.
- Buttons Not Responding:
- Gently press the buttons to ensure proper contact.
- If the device is unresponsive, try disconnecting and reconnecting the power cable to perform a soft reset.
If problems persist after attempting these steps, please refer to the support information provided by your retailer.
6. Specifications
| Feature | Specification |
|---|---|
| Brand | Generic |
| Model Number | PFHAN-8206341-03 |
| Part Number | 9791_PFHAN-8206341-03 |
| Compatible Vehicle | BMW 3 Series Touring G21 (2019-2022) |
| Power Supply | USB (5-24V) |
| Display Type | 3D Reflection Display |
| GPS Module | Integrated GPS+BDS chip with 10Hz refresh rate |
| Dimensions (L x W x H) | Approximately 10 x 10 x 10 millimeters (refer to images for detailed measurements) |
| Country of Origin | China |
7. Warranty and Support
For warranty information and customer support, please refer to the documentation provided by your retailer or contact the seller directly. This product may be eligible for a 30-day free return policy, depending on the retailer's terms and conditions.