ULT-unite HDMI to Type-C Converter User Manual

1. Introduction

Thank you for choosing the ULT-unite HDMI to Type-C adapter. This product is a high-performance audio/video conversion adapter designed to transmit standard HDMI source signals to display devices that use a Type-C video input interface. It features an active built-in chip for conversion, supports up to 4K Ultra HD (3840x2160) @ 60Hz high-definition resolution, and is equipped with an independent Type-C power delivery port to ensure stable and smooth transmission.

Important Note: This product is unidirectional. The signal direction is ONLY HDMI to Type-C. It cannot be used to convert Type-C to HDMI.

Key Features

• Ultra High Definition: Supports up to 4K@60Hz output, backward compatible with 2K, 1080P, and other resolutions.
• Broad Compatibility: Compatible with Type-C displays and AR glasses supporting DP Alt Mode. See the full list below.
• Independent Power Delivery: Type-C power input (5V/2A) provides additional power to ensure stable operation with larger displays and demanding devices.
• Durable Construction: Aluminum alloy shell for heat dissipation, ABS engineering plastic front/rear covers. Ports feature nickel-plated icon shells and gold-plated terminals for oxidation resistance and durability.
• Plug and Play: No drivers required. Automatically recognizes and outputs the display signal after connection.

Compatible Devices (Confirmed)

• RayNeo AR Glasses
• XREAL Air Glasses
• Rokid Air/Max Glasses
• Thunderbird AR Glasses
• GRAWOOA Glasses
• Nintendo Switch (Docked Mode)
• Steam Deck (Docked Mode)
• Microsoft Xbox (All HDMI models)
• Laptops & PCs with HDMI Output
• Portable Monitors (Type-C Input)
• Smart TVs & Set Top Boxes

Not Compatible Devices

• All Meta Quest Headsets (Quest 1, 2, 3, Pro)
• Devices requiring USB data connection for video

2. Important Notes & Safety Precautions

• Unidirectional Only: This adapter only converts HDMI male to USB-C female. It cannot convert signals in the opposite direction (USB-C to HDMI).
• Display Device Requirement: Ensure the USB-C port of your display device (e.g., portable monitor, AR glasses) supports video input (DisplayPort Alt Mode). Not all USB-C ports do.
• Power Adapter: When the adapter is connected to power, avoid using low-power Apple chargers (e.g., 5W) as they may not provide sufficient power. The adapter is suitable for use with hubs and docking stations as the video source.
• Resolution & Refresh Rate: Maximum supported resolutions are 4K@60Hz, backward compatible with 2K, 1080P, 720P, and refresh rates like 1080P@144Hz. Higher resolutions/refresh rates require support from both your source and display devices. Note: The RayNeo Air 2S does not support 120Hz via HDMI input; it only supports 120Hz via direct USB-C connection, so this adapter will not enable 120Hz on that device.
• Connection Issues: If there's no display when connected to iPhone or other devices, try re-plugging the cables several times. Always check for loose connections first if the screen doesn't display properly.
• Do not connect in reverse. This product cannot convert Type-C signals to HDMI signals.
• Avoid bending or pulling the cables forcefully during use.
• Do not use the product in high temperature, humid, or dusty environments.
• Clean with a dry, soft cloth. Do not use chemical solvents.
• If not used for an extended period, disconnect all cables and store in a dry place.

3. Specifications

4. Setup Guide

This section provides detailed instructions for connecting your ULT-unite HDMI to Type-C Converter to various devices. Please follow the steps carefully.

General Connection Method

1. Connect the Source: Use a standard HDMI cable. Connect one end to your video source device (e.g., game console, laptop) and the other end to the adapter's HDMI Female port.
2. Connect Independent Power (IMPORTANT): Connect a 5V/2A (10W) or stronger wall charger to the converter's "Power In" port using a USB Type-C cable. Never use a weak (5V/1A) charger or a PC USB port for power, as this may not provide sufficient power for stable operation.
3. Connect the Display Device: Use a full-featured Type-C cable. Connect one end to the adapter's Type-C Output port and the other end to your Type-C display device (e.g., AR glasses, portable monitor).
4. Power On: Power on all devices. The display device should automatically recognize and display the source image.

Figure 1: Connection Diagram for HDMI to Type-C Converter

Instructions for AR Glasses (XREAL, Rokid, RayNeo, etc.)

For optimal performance with AR glasses, follow these specific steps:

1. Connect the HDMI source to the adapter.
2. MUST connect the power cable to the adapter's power Input port (5V/2A or stronger).
3. Plug the AR glasses' Type-C video cable directly into the adapter's Type-C Output port.
4. Turn on the source device and the AR glasses.

Special Instructions for XREAL Glasses (Nintendo Switch): When connected to Nintendo Switch, you MUST use the original Nintendo Switch charger to power the adapter. Ensure the Switch Dock is activated in TV mode. The converter must be removed from the Switch to operate the game.

Instructions for Portable Monitors

The connection steps MUST follow this order:

1. First: Connect the power cable to the adapter's power input port and to a wall charger. (This initial power-up is crucial).
2. Then: Connect the HDMI source to the adapter.
3. Finally: Connect the portable monitor to the adapter's Type-C Output port using its video cable.
4. Turn on all devices.

Figure 2: Connecting to Game Consoles with AR Glasses

Video Usage Guide

For a visual demonstration of the setup and connection process, please watch the official video:

5. Troubleshooting

Q1: No Picture, "No Signal" Displayed

• Check Power: This is the most common cause. Ensure you have connected independent power to the adapter using a 5V/1A or better charger.
• Check Connection Sequence: Follow the correct order, especially for portable monitors (see Setup Guide).
• Check Cables: Confirm all cables are working and are high-quality (especially the Type-C video cable).
• Check the Source: Ensure your video source device is powered on and outputting a signal.
• Check Resolution: Try lowering the output resolution on the source device to 1080P@60Hz first.
• Try Re-plugging: Try re-plugging all cables firmly.

Q2: Picture Flickers, Blacks Out, or Has Color Abnormalities

• Insufficient Power: Try using a higher power charger (e.g., 5V/2.4A or 3A).
• Cable Quality: Replace HDMI or Type-C cables with higher quality, certified ones.

Q3: Picture is Displayed but There is No Sound

Important: This converter transmits VIDEO signal only. Audio routing must be managed separately.

• General Solutions:
  1. For devices with built-in speakers: Set the audio output on your source device to its own speakers or audio jack.
  2. Connect headphones or speakers directly to the audio output of your source device.
• For XREAL/Rokid Glasses (Audio Setup - Required after each connection):
  1. Ensure your XREAL glasses firmware is updated to the latest version via the XREAL App.
  2. After connecting everything, press and hold the Brightness - button (until 1 beep).
  3. Then, immediately press and hold the Brightness + button (until 2 beeps). Wait 1 second, and the audio and video should be displayed at the same time. (Note: This operation is required after each re-plugging).
  4. Set the audio output on your HDMI source device to be switched to headphones or peripherals.

6. User Tips

• Power Source Flexibility: The converter can be powered by a USB-C cable connected to a wall charger, power bank, or even a laptop's USB port, as long as it provides sufficient power (5V/2A or stronger).
• Plug and Play for AR Glasses: Many users report that the converter works seamlessly with AR glasses like Rokid Max 2 and XREAL 1S without additional configuration, making them plug-and-play with compatible HDMI sources.
• Audio Transmission: The converter is capable of transmitting sound via the USB-C cable to your display device, provided the source device and display are correctly configured for audio output.
• Aspect Ratio Support: The adapter supports various aspect ratios including 16:10, 21:9, and 32:9. Note that in 32:9, some users have reported occasional image flickering.
• HDMI Cable Recommendation: For convenience, consider using a short HDMI male-to-male connector if you need to extend your HDMI cable length.
• Heat Management: Users have noted that the converter maintains a cool temperature during use, indicating good heat dissipation.
• 120Hz Support: While the RayNeo Air 2S has specific limitations, some setups have successfully achieved 1080p 120Hz with this converter. Ensure both your source and display support this refresh rate.

7. Maintenance

• Clean the device with a dry, soft cloth. Do not use chemical solvents.
• If not used for an extended period, disconnect all cables and store the converter in a dry place to prevent damage.

8. Warranty and Support

For warranty information and technical support, please refer to the official ULT-unite website or contact your retailer. A detailed user manual is also available in PDF format for download: Download User Manual (PDF).