1. Wprowadzenie
This manual provides detailed instructions for the installation, operation, and maintenance of your BY-J HUD-G12 Heads Up Display. Designed for universal vehicle compatibility, this digital GPS speedometer offers essential driving data directly in your line of sight, enhancing safety and convenience. Please read this manual thoroughly before use to ensure proper functionality and to maximize your device's potential.
2. Funkcje produktu
- All-in-One Core Driving Data: Displays real-time speed (MPH/KM/H), direction, altitude, and clock.
- 6 Customizable Display Modes: Tailor the interface to your preference for clear, adaptable data visibility.
- Dual-Mode GPS + BDS: Equipped with advanced dual-chip technology and a 10Hz high refresh rate for fast, accurate positioning and stable real-time speed data. Connects to up to 32 satellites simultaneously.
- Smart Auto-Brightness & Anti-Glare Display: Built-in intelligent light sensor adjusts screen brightness dynamically. Features high-contrast large fonts and anti-glare metal blackout technology.
- Dual Safety Alerts: Customizable Overspeed Alert and Fatigue Alert (triggers after 4 hours of continuous driving).
- Multi-Functional Navigation: Built-in compass provides real-time directional guidance.
- Universal USB Plug-and-Play: Compatible with all USB-equipped vehicles (cars, motorcycles, trucks, golf carts). No tools or modifications needed.
- Comprehensive Mileage Tracking: Features permanent ODO (total distance) auto-save and trip meter for accurate driving analytics.
- Automatyczny przełącznik: Automatically turns on and off with vehicle ignition.
3. Zawartość opakowania
Upon opening your BY-J HUD-G12 package, please verify that all the following items are included:
- BY-J HUD-G12 Heads Up Display Unit
- USB Power Cable (Type-C interface)
- Obrotowy uchwyt na przyssawkę
- Mata antypoślizgowa
- Instrukcja obsługi (ten dokument)

Figure 3.1: Package Contents of the BY-J HUD-G12.
4. Koniec produktuview
The BY-J HUD-G12 is designed for clear and intuitive display of critical driving information. Familiarize yourself with its components and display functions.
4.1 Komponenty urządzenia

Figure 4.1: BY-J HUD-G12 Device Components and Dimensions.
- Multi-function Dial Keys: Służy do poruszania się po menu i zmieniania ustawień.
- 360° Rotating Bracket Slot: For attaching the suction cup holder.
- High-speed Type-C Interface: Do podłączenia zasilania.
- Automatyczny czujnik: Detects ambient light for auto-brightness adjustment.
4.2 Funkcje wyświetlacza

Figure 4.2: G21 Display Function Overview.
The display provides various data points and indicators:
- Speed Display Area: Shows current vehicle speed.
- Kompas: Indicates driving direction (N, S, E, W).
- Speed Alarm Icon: Illuminates when overspeed alert is active.
- Jednostka prędkości: Displays MPH or KM/H.
- Ikona satelity: Wskazuje status sygnału GPS.
- Fatigued Driving Icons: Alerts for prolonged driving.
- Wielofunkcyjny obszar wyświetlania: Can show altitude, distance traveled, travel time, total mileage, or acceleration time.
- Oświetlenie otoczenia: Decorative lighting that changes with speed.
5. Konfiguracja i instalacja
The BY-J HUD-G12 is designed for easy plug-and-play installation in any vehicle with a USB port.
5.1 Połączenie zasilania
- Locate an available USB port in your vehicle. This can be a dedicated USB charging port or a USB port connected to your car's infotainment system.
- Connect the provided USB power cable to the Type-C interface on the back of the HUD-G12 unit.
- Plug the other end of the USB cable into your vehicle's USB port.
- Urządzenie włączy się automatycznie po włączeniu zapłonu pojazdu.
Video 5.1: Demonstration of connecting the HUD-G12 to a vehicle's USB port.
5.2 Montaż urządzenia
You have two primary options for mounting the HUD-G12:
- Dashboard Placement (using Non-slip Mat):
Place the non-slip mat on a flat, stable surface of your dashboard. Position the HUD-G12 unit on the mat. Ensure it does not obstruct your view drogi. - Windshield Mounting (using Suction Cup Holder):
Attach the rotary suction cup holder to the slot on the back of the HUD-G12 unit. Clean a suitable area on your windshield, ensuring it is free from dust and grease. Press the suction cup firmly against the windshield and engage the locking mechanism. Adjust the angle of the HUD-G12 for optimal viewing. The holder allows for 360-degree rotation.
Figure 5.2: 360-degree rotation of the suction cup holder.
Ważny: Ensure the device is securely mounted and does not interfere with airbags or your driving visibility.
6. Instrukcja obsługi
The HUD-G12 offers various display modes and settings to customize your driving experience.
6.1 Włączanie/wyłączanie zasilania
The device automatically powers on when connected to a powered USB port and the vehicle's ignition is on. It will power off automatically when the ignition is turned off.

Figure 6.1: Automatic power on/off with vehicle ignition.
6.2 Zmiana trybów wyświetlania
Use the multi-function dial keys on the device to cycle through the available display modes. The HUD-G12 features 6 customizable modes, including:
- Tylko prędkość
- Tylko czas
- Speed + Travel time
- Speed + Distance traveled + Ambient lighting
- Speed + Total Mileage + Compass + Ambient Lighting
- Speed + Altitude + Compass + Ambient Lighting

Figure 6.2: Multiple display modes available on the HUD-G12.
6.3 Unit Selection (MPH/KM/H)
Refer to the detailed instructions provided in the included paper manual for specific steps on how to switch between MPH and KM/H units using the multi-function dial keys.
6.4 GPS and BDS Dual-Mode Chip
The device utilizes a 10Hz high refresh rate GPS and Beidou dual-mode chip for accurate and stable data acquisition. This ensures reliable speed and positioning information even in challenging environments.

Figure 6.3: GPS+Beidou dual-mode chip for enhanced accuracy.
7. Alarmy bezpieczeństwa
The HUD-G12 includes features to promote safer driving habits.
7.1 Overspeed Alert
The device can be configured to alert you when your vehicle exceeds a preset speed limit. The default overspeed alert is set to 120 km/h. You can adjust this threshold using the multi-function dial keys. When the alert is triggered, a visual indicator will appear on the display.
7.2 Alert zmęczenia podczas jazdy
To prevent driver fatigue, the HUD-G12 will issue an alert after 4 hours of continuous driving. This serves as a reminder to take a break and rest.

Figure 7.1: Overspeed and Fatigue Driving Alerts.
8. Konserwacja
To ensure the longevity and optimal performance of your BY-J HUD-G12, follow these maintenance guidelines:
- Czyszczenie: Use a soft, dry cloth to clean the display screen and the device body. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the unit.
- Temperatura: Do not expose the device to extreme temperatures, either hot or cold, for extended periods.
- Wilgoć: Utrzymuj urządzenie w suchości. Unikaj kontaktu z wodą i innymi płynami.
- Składowanie: When not in use for an extended period, store the device in a cool, dry place away from direct sunlight.
9. Rozwiązywanie Problemów
If you encounter issues with your BY-J HUD-G12, please refer to the following common troubleshooting steps:
- Urządzenie nie włącza się:
Ensure the USB cable is securely connected to both the HUD-G12 and a functional USB port in your vehicle. Verify that the vehicle's ignition is on. Try a different USB port or cable if available. - No Speed Display/Inaccurate Speed:
Upewnij się, że urządzenie jest czyste view of the sky to receive GPS signals. It may take a few moments for the device to acquire satellite signals upon startup. Drive in an open area away from tall buildings or tunnels. - Wyświetlacz zbyt ciemny/jasny:
The device features an automatic light sensor. Ensure the sensor is not obstructed. If manual adjustment is desired, refer to the detailed settings in the included paper manual. - Overspeed/Fatigue Alert Not Working:
Check the settings for these alerts using the multi-function dial keys to ensure they are enabled and configured to your preferences. - Urządzenie zawiesza się lub działa nieprawidłowo:
Disconnect the USB power cable, wait for a few seconds, and then reconnect it to perform a soft reset.
Jeśli po wykonaniu tych czynności problem nadal występuje, skontaktuj się z obsługą klienta, aby uzyskać dalszą pomoc.
10. Specyfikacje
| Funkcja | Specyfikacja |
|---|---|
| Marka | BY-J |
| Numer modelu | G12-HUD |
| Wymiary produktu (dł. x szer. x wys.) | 3.27 x 0.72 x 2.19 cala |
| Waga przedmiotu | 2 funtów |
| Tworzywo | Akrylonitryl-butadien-styren (ABS) |
| Typ wyświetlacza | Wyświetlacz cyfrowy LED |
| System pozycjonowania | GPS + BDS Dual-Mode |
| Częstotliwość odświeżania | 10 Hz |
| Źródło zasilania | USB (podłącz i graj) |
11. Gwarancja i wsparcie
Your BY-J HUD-G12 Heads Up Display is covered by a manufacturer's warranty against defects in materials and workmanship. For specific warranty terms, duration, and conditions, please refer to the warranty card included with your product or contact BY-J customer support.
For technical support, troubleshooting assistance, or any inquiries regarding your product, please visit the official BY-J website or contact their customer service department through the contact information provided in your product packaging or on the brand's official channels.