1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Roinvou 9-inch car stereo system. This system is designed to enhance your driving experience with advanced features such as Wireless CarPlay, Android Auto, Bluetooth 5.0, GPS navigation, and a high-resolution touch screen. Please read this manual thoroughly before installation and use to ensure proper functionality and safety.
2. Vehicle Compatibility
This Roinvou car stereo is specifically designed for:
- Kia Forte Cerato K3 models manufactured between 2013 and 2018.
The system is engineered for seamless replacement of the original dash panel, requiring no wiring modifications for compatible vehicles. If you are unsure about compatibility, please consult the manufacturer with your car's model, production year, and a picture of your car's dashboard.

Image: Comparison of the car dashboard before and after installing the Roinvou 9-inch car stereo, showing the integrated fit.
3. What's in the Box
Please verify that all components listed below are included in your package:
- Roinvou Car Stereo Unit (for Kia Forte Cerato K3)
- Power Cable
- Radio Antenna
- RCA Harness
- GPS Antenna
- AHD Backup Camera
- External Microphone
- Rear Camera Input Cable
- 2 x USB Cables
- Installation Tool

Image: Visual representation of the product size and all included accessories in the package.
4. Setup and Installation
Professional installation is recommended. Ensure the vehicle's battery is disconnected before beginning installation.
4.1. Wiring Connections
Connect the provided power cable, RCA harness, USB cables, radio antenna, and GPS antenna to their respective ports on the back of the stereo unit and to the vehicle's wiring harness. Refer to the wiring diagram for correct connections.

Image: Diagram illustrating the wiring ports on the back of the stereo unit and the corresponding vehicle harness connections.
4.2. Backup Camera Installation
The included AHD backup camera automatically displays an image when the vehicle is shifted into reverse gear. Connect the red cable (1) to the positive terminal of the car's reverse light cable and the black cable (2) to the negative terminal. The reverse input cable must be plugged into the stereo unit even if the camera is not used, as it affects Bluetooth and WiFi signal reception.

Image: Step-by-step wiring instructions for the backup camera, detailing connections to the reverse light cables.
4.3. Steering Wheel Control (SWC) Setup
The stereo supports most factory multi-function steering wheel buttons (volume, skip tracks, etc.).
- Without CANBUS Decoder: Connect the Key1/Key2 steering wheel control wires in the power cable to the corresponding port or wire of your original car. Then, navigate to "SteeringWheel Key" in the stereo's settings to manually match and activate the button functions.
- With CANBUS Decoder: Connect the CANBUS decoder before powering on the machine. Then, go to Apps > Settings > Factory Settings (password: 8888/8317) > Vehicle > Automotive type. Select the brand of the CANBUS decoder and the matching model and year according to your vehicle's specifications.

Image: Instructions for configuring steering wheel controls, including options for vehicles with and without a CANBUS decoder.
5. Operating Instructions
5.1. Wireless CarPlay & Android Auto
Connect your iPhone or Android phone wirelessly to access navigation, music, calls, and other apps directly on the stereo's screen. Use voice assistants like Siri or Google Voice for hands-free operation, promoting safer driving.

Image: Display of the Wireless CarPlay and Android Auto interface, highlighting voice control, hands-free calling, online music, and map features.
5.2. Bluetooth 5.0 Connectivity
Pair your smartphone via Bluetooth 5.0 for dedicated music streaming and hands-free calls. This ensures a stable connection with minimal interference.

Image: Illustration of Bluetooth 5.1 features, including hands-free calling and music playback.
5.3. Mirror Link Function
Synchronize your Android or iOS smartphone screen to the stereo display. This allows you to view content like videos or games from your phone on the larger 9-inch screen.

Image: Demonstration of the Mirror Link function, mirroring a smartphone's display onto the car stereo screen.
5.4. GPS Navigation & WiFi
The unit features built-in GPS navigation. You can download offline navigation maps directly from the Play Store. After connecting to WiFi, online maps can also be used for real-time traffic and updates.

Image: GPS navigation screen displaying a map, route, and various online application icons accessible via WiFi.
5.5. FM/RDS Radio
Access your favorite radio stations with the FM/RDS tuner. The system supports auto-syncing RDS radio information, displaying frequency and program names. Preset options allow for quick access to preferred channels.

Image: Display of the FM/RDS radio interface, showing frequency selection and preset station management.
5.6. 32-Band EQ Tuning
Customize your audio experience with the 32-band equalizer. This feature allows for fine-tuning of sound frequencies to achieve optimal lossless sound quality, compensating for original speaker characteristics. Preset modes (Rock, Pop, Classic) and customizable EQ settings are available.

Image: Screenshot of the 32-band EQ settings, showing detailed frequency adjustments and sound balance options.
5.7. Split Screen Functionality
The stereo supports split-screen display, allowing you to run two applications simultaneously. For example, you can view navigation on one side and control music playback on the other.

Image: Example of the split-screen feature, displaying a multi-panel homepage and two applications running side-by-side.
6. Maintenance
- Screen Cleaning: Use a soft, lint-free cloth to gently wipe the touch screen. For stubborn smudges, slightly dampen the cloth with water or a screen-safe cleaner. Avoid abrasive materials or harsh chemicals.
- Software Updates: Periodically check for software updates via the system's settings menu when connected to WiFi. Keeping the software updated ensures optimal performance and access to new features.
- General Care: Avoid exposing the unit to extreme temperatures, direct sunlight for prolonged periods, or excessive moisture. Ensure all connections remain secure.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power / Unit Not Turning On | Loose power connection, blown fuse, incorrect wiring. | Check all power cable connections. Inspect vehicle fuses and the stereo's inline fuse. Verify wiring against the diagram. |
| No Sound | Volume too low, mute activated, loose speaker wires, incorrect audio settings. | Increase volume. Check if mute is active. Verify speaker wire connections. Adjust audio output settings in the EQ menu. |
| Bluetooth Connection Unreliable | Interference, incorrect pairing, software glitch. | Ensure no other devices are interfering. Re-pair the device. Restart both the stereo and the phone. Ensure the backup camera input cable is connected. |
| Microphone Clarity Issues (Hands-free calls) | Microphone placement, external noise, software settings. | Ensure the external microphone is properly installed and positioned away from vents or excessive noise. Check audio input settings if available. |
| Steering Wheel Controls Not Working | Incorrect wiring, improper software configuration. | Verify Key1/Key2 wiring. Reconfigure SWC settings as described in Section 4.3. Ensure CANBUS decoder is correctly installed and configured if applicable. |
| Screen Too Bright at Night / No Auto Brightness | Lack of automatic brightness sensor, manual setting required. | Manually adjust screen brightness through the display settings menu for night driving. |
| GPS Signal Loss / Inaccurate Navigation | GPS antenna placement, environmental interference. | Ensure the GPS antenna is mounted in a clear line of sight to the sky, away from metal obstructions. |
If issues persist after attempting these solutions, please contact Roinvou customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Display Size | 9 Inches |
| Resolution | 1280 x 720 (HD) |
| Operating System | Android |
| RAM | 4GB |
| Storage | 64GB |
| Connectivity | Bluetooth 5.0, USB, Wi-Fi (5GHz), Wireless CarPlay, Wireless Android Auto |
| Special Features | Touchscreen, GPS Navigation, FM RDS Radio, Support Reverse Input, Split Screen, 32 EQ Setting, Steering Wheel Control (SWC), Mirror Link |
| Audio Output Mode | Stereo |
| Mounting Type | Dashboard Mount |
| Item Weight | 3.21 pounds |
| Package Dimensions | 11.65 x 11.06 x 3.86 inches |
9. Warranty and Support
Warranty: The Roinvou 9-inch Car Stereo comes with a 1-Year Warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. Please retain your proof of purchase for warranty claims.
Customer Support: For technical assistance, troubleshooting not covered in this manual, or warranty inquiries, please contact Roinvou customer support through the retailer where the product was purchased or visit the official Roinvou website for contact information.
For additional resources and product information, you may visit the Roinvou Store on Amazon.







