1. Product Overview
The RYSJM P3 Head Up Display (HUD) is a versatile digital instrument designed to enhance your driving experience by providing critical vehicle information directly in your line of sight. Featuring a 6-inch large screen, this device integrates both OBD (On-Board Diagnostics) and GPS systems, along with a slope meter and accelerometer, offering a comprehensive suite of data for improved safety and awareness. It is suitable for gasoline vehicles with OBD2 compatibility.
2. Key Features
- Dual System Integration: Combines OBD and GPS for extensive data coverage.
- Large 6-inch HD LCD Display: Provides clear, easy-to-read information with new interface designs, larger fonts, and smoother visuals.
- Multi-functional Display: Shows a wide range of parameters including:
- OBD speed, RPM, Water Temperature, Voltage, Oil Temperature, Variable Speed Oil Temperature, Turbine Pressure, Instantaneous Fuel Consumption, Average Fuel Consumption, Engine Load, Exhaust Temperature, Amount of Oil, Outside Temperature, Inlet Air Temperature, Power Battery Level, Oil Pressure, Fuel Pressure.
- GPS Speed, Number of Satellites, Compass, Altitude, Clock, Travel Distance, Travel Time, Atmospheric Pressure, Latitude and Longitude, Total Mileage, Week, Date.
- Acceleration Test, Brake Test, Roll Angle, Pitch Angle, PID Data.
- Advanced Sensors: Built-in 6-axis sensor (3-axis gyroscope, 3-axis accelerometer) for accurate slope and G-force measurements.
- Multiple Alarm Functions: Includes Overspeed alarm, RPM alarm, Water temperature alarm, Voltage alarm, Oil temperature alarm, Exhaust temperature alarm, Oil pressure alarm, Fuel pressure alarm, and Tired driving reminder.
- Ambient Lighting: Features illusion breathing mood lights with multiple color combinations, adjustable discoloration breathing rate (0-10), flow ambient light (left/right outside flow, 0-10 speed adjustment, default static), and speed ambient light (increasing/decreasing with engine speed, 1000 rpm per grid). Ambient light can be turned on/off.
- High-Performance Chip: Equipped with a 9th generation dual-core and dual-chip processor for powerful performance and faster refresh rates.
3. Package Contents
Please check the package for the following items:
- P3 HUD Unit
- OBD Line (1.8m)
- Non-slip Mat
- Instructions Manual
- Split Bracket
Note: Product weight is approximately 136g. Box size is 15x6x9 cm, with a total weight of approximately 268g.

Image: P3 HUD package contents including the main unit, OBD cable, non-slip mat, instructions, and split bracket.
4. Installation
The P3 HUD offers multiple installation methods using the provided split bracket for adjustable visual angle and height.

Image: Multiple installation methods for the P3 HUD, showing the adjustable split bracket and placement on the dashboard.
4.1. Compatibility Check
This dual-system head-up display is primarily designed for gasoline vehicles. Ensure your vehicle meets the following criteria:
- Gasoline Vehicles: Only compatible with gasoline-powered vehicles.
- OBD2 Agreement:
- For vehicles in the United States, it must be produced after 2004.
- For vehicles in other regions, it must be produced after 2008.
Important Note: Some cars may still not be compatible. It is recommended to verify your vehicle's OBD2 certification or the presence of an automobile diagnosis port before purchase. For U.S. cars, compatibility is generally for models after 2003; for most other cars, after 2007.

Image: Diagram showing how to check for OBD2 certification and locate the OBD2 port in a vehicle, with examples of an OBD2 CERTIFILE sticker and the port location.
4.2. Installation Steps
- Locate the OBD2 Interface: The OBD2 port is typically found under the dashboard, near the steering wheel or pedals.
- Connect the OBD Cable: Plug the provided OBD cable into your vehicle's OBD2 port.
- Route the Cable: Carefully route the OBD cable along the A-pillar or dashboard edges to conceal it and prevent interference with driving.
- Position the HUD Unit: Place the P3 HUD unit on your dashboard using the non-slip mat or attach it with the split bracket.
- Adjust Viewing Angle: Adjust the unit's position and angle for optimal visibility without obstructing your view of the road.
Video: Demonstration of P3 HUD installation, including locating the OBD2 port, plugging in the cable, routing the cable, and positioning the unit on the dashboard.
5. Operation
5.1. Basic Controls
The P3 HUD features intuitive controls for easy navigation and customization:
- Power On/Off: Press and hold for 2 seconds to shut down.
- Screen Switching: Short press the 'M' key to cycle through different display interfaces.
- Main Screen Function Selection: Long press the 'M' key for 2 seconds to select the main screen function.

Image: Diagram illustrating the P3 HUD's dimensions and button functionalities for screen switching and power control.
5.2. Display Interfaces
The P3 HUD offers 13 core interfaces and multiple theme options to suit your preferences:
- Standard Interfaces: Digital, Instrument, Inclinometer, G-Force, Turbine Pressure, PID Data.
- Theme Interfaces: Slope Meter Theme, Gauge Topic, Digital Themes, 100km Acceleration Theme.

Image: Collage showcasing 13 diverse display interfaces of the P3 HUD, including speed, RPM, water temp, voltage, clock, and more.

Image: Examples of multiple theme interfaces on the P3 HUD, including slope meter, gauge topic, digital, and 100km acceleration themes, demonstrating customizable visual styles.
5.3. Settings Menu
To access the settings menu, long press the 'M' key. Here you can customize various parameters:
| Setting | Options/Description |
|---|---|
| Speed Unit | KM/H, MPH |
| Temperature Unit | °C, °F |
| Altitude Unit | M, Feet |
| Language | English (default) |
| Time Zone | Adjustable (+/- hours) |
| Brightness | AUTO, 1-8 (manual adjustment) |
| Dark | 1-8 (night mode brightness) |
| Night LED Brightness | Adjustable for ambient lights |
| Power On | Voltage threshold for automatic power on (e.g., 13.2V) |
| Turn OFF | Mode for automatic power off (e.g., MODE: 0) |
| Quest Mode | MULTI |
| Request Rate | 50ms |
Ambient Light Settings:
- Symphony Combination Mood Lights: Choose your favorite color combinations.
- Flow Ambient Light: Adjust speed (0-10) for left and right outside flow (default is static).
- Speed Ambient Light: Lights increase or decrease with engine speed (1000 rpm per grid).
- Turn Off Ambient Light: Option to turn ambient lights on or off (on by default).

Image: Screenshot of the P3 HUD system settings interface, detailing options for speed unit, temperature unit, language, time zone, brightness, and other system configurations.
6. Alarms
The P3 HUD includes multiple alarm functions to alert you to potential issues and enhance driving safety:
- Overspeed alarm
- RPM alarm
- Water temperature alarm
- Voltage alarm
- Oil temperature alarm
- Exhaust temperature alarm
- Oil pressure alarm
- Fuel pressure alarm
- Tired driving reminder

Image: P3 HUD displaying alarm reminders and a list of its multiple alarm functions, including overspeed, RPM, and temperature warnings.
7. Vehicle Accelerometer & Slope Meter
7.1. Vehicle Accelerometer (G-Value Table)
The built-in accelerometer provides G-value readings, which are essential for performance monitoring:
- Acceleration G-value: Indicates the force during acceleration.
- Braking G-value: Shows the force during braking.
- Left Turn G-value: Measures lateral force during left turns.
- Right Turn G-value: Measures lateral force during right turns.
A larger G-value signifies stronger acceleration/deceleration performance and better cornering control.

Image: Diagram illustrating the vehicle accelerometer G-value table, showing acceleration, braking, left turn, and right turn G-values, with corresponding visual representations of a car's movement.
7.2. Electronic Slope Meter (G-Sensor)
The P3 HUD features a 6-axis G-sensor (3-axis gyroscope, 3-axis accelerometer) to provide real-time information on your vehicle's body posture. This is particularly useful for off-road driving to ensure safety by monitoring:
- Uphill slope
- Downhill slope
- Tilt left
- Tilt right

Image: Images demonstrating the electronic slope meter function of the P3 HUD, showing uphill, downhill, tilt left, and tilt right scenarios with corresponding digital readouts and vehicle illustrations.
8. PID Data
The P3 HUD can read and display comprehensive ECU (Engine Control Unit) data via the OBD interface, providing practical information about your vehicle's trip computer. The available PID data includes, but is not limited to:
| PID Category | Examples of Data |
|---|---|
| Engine Status | EngineRunTime, Fuel sys, Engine load, Coolant Temp, Fuel Trim (S1, L1, S2, L2), FuelRail Pres, Intake Pres, RPM, Speed, Ignition, MAF Rate, Throttle Pos, OxygenSen Pos, Catalyst Temp |
| Diagnostic Codes | DTC status, Freeze DTC, DTC Dis, DTC time |
| Fuel & Emissions | Fuel Inject, EmissionStand, Fuel Lev, Fuel type, Ethanol Fuel |
| Sensors & Values | Voltage, Absolute load, EquivAF, Throttle Pos, Air Temp, Accpedal Pos, NOx Sensor, Boost F, Throttle Comd, Max Airflow, Max AF, TankPress Kpa, Oil Temp |
| GPS Data | GPS Speed, GPS NumSv, GPS lon, GPS lat, GPS altitude |

Image: P3 HUD displaying PID data, providing detailed information from the vehicle's ECU.

Image: A comprehensive list of PID data that can be displayed by the P3 HUD, categorized for easy reference, including engine, diagnostic, fuel, sensor, and GPS data.
9. Specifications
| Attribute | Detail |
|---|---|
| Brand Name | RYSJM |
| Model | P3 |
| Product Name | Head-up display gauge |
| Display Channel | HD LCD Display |
| Screen Size | Approx. 6 inches (screen-to-body ratio) |
| Dimensions (approx.) | Width: 156mm (6.15 in), Height: 75mm (2.96 in), Side Depth: 21mm (0.83 in) |
| Connectivity | Wired (OBD2 + GPS) |
| Rated Power | OBD GPS |
| Features | GPS speedometer, HUD, Inclinometer, Slope meter, Roll angle danger alarm, Digital car speedometer, Car Electronics Accessories |
| Newest Systems | OBD2 + GPS + Slope meter |
| Product Weight | 136g |
| Box Size | 15 x 6 x 9 cm |
| Box Weight | 268g |
| Origin | Mainland China |

Image: Diagram illustrating the physical dimensions of the P3 HUD unit.
10. Troubleshooting
- No Display/Power:
- Ensure the OBD cable is securely plugged into both the HUD unit and the vehicle's OBD2 port.
- Verify your vehicle's compatibility with OBD2 (refer to Section 4.1).
- Check the vehicle's ignition status; the HUD typically powers on with the ignition.
- Inaccurate Speed/Data:
- If using GPS mode, ensure the unit has a clear view of the sky for satellite acquisition.
- Check the 'Speed Unit' setting in the System Set menu to ensure it matches your preference (KM/H or MPH).
- If OBD data is inaccurate, ensure your vehicle is fully OBD2 compliant and the connection is stable.
- Alarms Not Functioning:
- Navigate to the settings menu and verify that the specific alarm functions (e.g., Overspeed, Water Temperature) are enabled and configured correctly.
- Screen Freezes or Malfunctions:
- Try restarting the device by unplugging and re-plugging the OBD cable.
- If the issue persists, perform a factory reset (if available in settings, consult seller for specific instructions).
- Ambient Lights Not Working:
- Check the ambient light settings in the System Set menu to ensure they are enabled and configured as desired.
11. User Tips
- Optimal Placement: Experiment with different dashboard positions to find the best spot that offers clear visibility without obstructing your view of the road.
- Cable Management: Take time to neatly route the OBD cable to prevent it from interfering with pedals or other controls, and to maintain a clean interior aesthetic.
- Brightness Adjustment: Utilize the automatic brightness feature or manually adjust it in the settings for optimal visibility during both day and night driving conditions.
- Explore Interfaces: Familiarize yourself with the 13 different display interfaces and themes to quickly switch to the information most relevant to your current driving needs.
- Off-Road Safety: When driving off-road, pay close attention to the slope meter and accelerometer readings to monitor vehicle stability and prevent dangerous situations.
12. Maintenance
- Cleaning: Use a soft, dry cloth to clean the display screen and the unit's body. Avoid using harsh chemicals or abrasive materials that could damage the surface.
- Cable Care: Ensure the OBD cable is not pinched or excessively bent, which could lead to damage.
- Storage: If storing the device for an extended period, disconnect it from the vehicle and store it in a cool, dry place away from direct sunlight.
13. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.





