1. Introduction
The Ottocast Mini Tube is a compact wireless adapter designed to convert your vehicle's existing wired Apple CarPlay or Android Auto system into a wireless connection. This device allows for seamless integration of your smartphone's navigation, communication, and entertainment features directly onto your car's display without the need for cables.
Enjoy a more convenient and clutter-free driving experience with automatic reconnection and stable performance. This adapter is compatible with vehicles equipped with factory-fitted wired CarPlay or Android Auto, and supports smartphones running iOS 10+ or Android 11+.

Image: The Ottocast Mini Tube adapter connected in a vehicle, demonstrating the wireless display of CarPlay and Android Auto interfaces on the car's screen.
2. Package Contents
Please verify that all the following items are included in your package:
- Ottocast Mini Tube Main Unit
- User Manual
- USB Plug Adapter (Type-A to C)

Image: A visual representation of the Ottocast Mini Tube package contents, showing the main unit, a USB Type-C adapter, and the instruction manual.
3. Setup Instructions
Follow these steps for the initial setup of your Ottocast Mini Tube:
- Connect the Adapter: Plug the Ottocast Mini Tube into your car's USB port that supports wired CarPlay or Android Auto. Use the provided USB Type-A to C adapter if your car has a Type-C port.
- Activate Bluetooth & Wi-Fi: On your smartphone, ensure both Bluetooth and Wi-Fi are enabled.
- Pair with Device: On your smartphone's Bluetooth settings, search for and select the device named "CAR2-xxx" (where xxx is a unique identifier). Confirm the pairing request.
- Allow Wi-Fi Connection: Your phone may prompt you to allow a Wi-Fi connection to the device. Accept this request.
- Verify Connection: Once connected, the CarPlay or Android Auto interface should appear on your car's display. The LED indicator on the Mini Tube will show a steady blue light when connected to your smartphone.
After the initial setup, the device will automatically reconnect to your smartphone when you start your car, provided Bluetooth and Wi-Fi are active on your phone. The device remembers up to two paired phones, prioritizing the most recently connected one. If connection fails, it will attempt to connect to the other stored device within 15-30 seconds.

Image: A visual guide illustrating the three main steps for connecting the Ottocast Mini Tube: plugging it into the car's USB port, pairing via Bluetooth and Wi-Fi on a smartphone, and confirming the connection.
4. Operating Instructions
Once connected, you can utilize your smartphone's features through your car's display and controls:
- Navigation: Access your preferred navigation apps (e.g., Google Maps, Apple Maps) directly on your car's screen.
- Music & Audio: Play music, podcasts, and audiobooks from your smartphone's apps.
- Calls & Messages: Make and receive calls, and send/receive messages using your car's interface.
- Voice Control: Use voice commands (e.g., "Hey Siri" or "Hey Google") to control navigation, make calls, play music, and more, keeping your hands on the wheel.
- Control Methods: Interact with the system using your car's existing controls, including dial, steering wheel controls, voice commands, and touch screen (if available).

Image: A driver interacting with the car's infotainment system using voice commands and physical controls, enabled by the Ottocast Mini Tube for a smart driving experience.
5. Maintenance
To ensure the longevity and proper functioning of your Ottocast Mini Tube, please observe the following:
- Do not disassemble or modify the device. Unauthorized modifications can void the warranty and may cause damage.
- Avoid exposing the device to extreme temperatures, direct sunlight for prolonged periods, or excessive moisture.
- Use only the specified 5V power source. Do not use power sources that exceed the rated voltage, as this can damage the device.
- Keep the device clean by wiping it with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
6. Troubleshooting
If you encounter issues with your Ottocast Mini Tube, try the following troubleshooting steps:
- Connection Failure: If the device fails to connect, delete the previous connection history from your smartphone's Bluetooth and Wi-Fi settings. Ensure both Bluetooth and Wi-Fi are turned ON simultaneously on your phone before attempting to reconnect.
- Intermittent Connection/Audio Drops: Ensure your smartphone is within close proximity to the adapter (within approximately 10m Bluetooth range). Check for any potential interference from other wireless devices.
- No Display on Car Screen: Verify that your car's USB port is functioning correctly and supports wired CarPlay/Android Auto. Ensure the Mini Tube is securely plugged in.
- Power Issues: Confirm that the USB port in your car provides sufficient power (5V). Some older car models or specific USB ports might have lower power output.
- Software Updates: The device supports Over-The-Air (OTA) updates. If you experience persistent issues, check for available software updates via your smartphone. Access the designated update page (usually provided in the full manual or via a QR code) and follow the on-screen instructions. During an update, the LED will flash red, blue, and green alternately. A solid white light indicates completion.

Image: A smartphone displaying the OTA update interface for the Ottocast Mini Tube, indicating the progress of a software update.
7. Specifications
| Brand | OTTOCAST |
| Model Name | CP88-T4 |
| Dimensions (L x W x H) | 25mm x 25mm x 25mm |
| Connectivity Technology | Bluetooth |
| Control Method | Touch, Voice |
| Power Input | 5V (USB-A / USB Type-C compatible) |
| Wireless Range (Bluetooth) | Approx. 10m (varies by environment) |
| Compatibility | Vehicles with factory-fitted wired CarPlay/Android Auto, iOS 10+, Android 11+ |
| GTIN | 717623123077 |
8. Warranty and Support
The Ottocast Mini Tube comes with a 1-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For technical assistance, troubleshooting, or warranty claims, please contact Ottocast customer support. Refer to the contact information provided in the full user manual or on the official Ottocast website. Please do not attempt to repair the device yourself, as this may void the warranty.
For safety, avoid watching videos while driving. Do not disassemble or modify the product.