ULT-unite HDMI to Type-C Adapter User Manual

1. Product Overview

Thank you for choosing this 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:

• The product is unidirectional. The signal direction is ONLY HDMI to Type-C. It cannot be used in reverse (Type-C to HDMI).
• Type-C & HDMI cables are not included.

Figure 1: Adapter overview with input/output ports and example connections.

2. 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.
• Independent Power Delivery: Type-C power input (5V/1A or 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.

Figure 2: Demonstrating 4K@60Hz HD picture quality with a game console.

3. Compatibility List

Fully Compatible Devices (Confirmed):

• RayNeo AR Glasses
• XREAL Air Glasses
• Rokid Air/Max Glasses
• Thunderbird AR Glasses
• GRAWOOÁ 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

4. Important Notes (Please Read Before Use)

1. Unidirectional Only: This adapter only converts HDMI male to USB-C female. It cannot transmit signals in the opposite direction (USB-C to HDMI).
2. 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.
3. 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.
4. 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.

5. 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.

5. Interfaces & Specifications

Figure 3: Adapter showing HDMI, Power Input, and Type-C Output ports.

6. Setup and Operation

General Connection Method:

1. Connect the Source: Use a standard HDMI cable. Connect one end to your video source device and the other end to the adapter's HDMI Female port.
2. Connect Power (IMPORTANT!): Use another USB Type-C cable. Connect one end to a 5V/1A or higher power USB charger and the other end to the adapter's Power Input port. Connecting independent power is strongly recommended.
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.
4. Power On: Power on all devices. The display device should automatically recognize and display the source image.

Figure 4: Simple plug & play operation.

Connecting to Game Consoles:

Figure 5: Connection examples for game consoles.

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

Standard Connection Steps:

1. Connect the HDMI source to the adapter.
2. Must connect the power cable to the adapter's power Input port.
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:

When connected to Nintendo Switch:

• MUST use the original Nintendo Switch charger to power the dock.
• Ensure XREAL glasses firmware is updated to the latest version via the phone app.
• After connecting everything, press and hold the brightness button (ringing once), then immediately press and hold the brightness button (ringing twice). Wait 1 second, and the audio and video will be displayed at the same time. (Note: This operation is required after each re-plugging).
• The audio output on your PC, Switch, PS must be switched to headphone output or external peripheral before connecting the adapter to the glasses.

XREAL Audio Troubleshooting:

1. Please upgrade XREAL glasses firmware to the latest version via the XREAL App.
2. After upgrading, press and hold the brightness button (ringing once), then press and hold brightness button (ringing twice). Wait for 1 second, and the Audio and video will be displayed at the same time. (Note: This operation is required after each re-plugging).
3. The audio output of the HDMI output device needs to be switched to headphone output or other peripherals.
4. Ensure the Dock is activated in TV mode.
5. The controller must be removed from the Switch to operate the game.
6. When connected to a PC, Laptop, TV Box, PS4/PS5, the adapter must be connected to a wall charger, not to the USB-A port of the source device or console, as most USB-A ports are underpowered.

Instructions for Portable Monitors:

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 6: Connecting a laptop to a portable monitor.

7. Troubleshooting

Q1: No Picture, "No Signal" Displayed

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

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

1. Insufficient Power: Try using a higher power charger (e.g., 5V/2.4A or 3A).
2. 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.

8. User Tips

• Always use high-quality, full-featured Type-C video cables and certified HDMI cables for optimal performance.
• Ensure the adapter receives sufficient power (5V/1A or higher) from a dedicated wall charger, especially when connecting to larger displays or power-hungry devices like AR glasses. Avoid using low-power USB ports from source devices.
• For AR glasses, always ensure their firmware is up-to-date, and follow specific audio setup procedures outlined in the manual or by the glasses manufacturer.
• If experiencing "No Signal" or display issues, double-check all cable connections, power supply, and the connection sequence, particularly for portable monitors.
• If audio is not present, remember that the adapter primarily handles video. Configure audio output directly from your source device (PC, console, etc.) to headphones, speakers, or the display's audio output.

9. Maintenance

• 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.

10. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the product packaging or contact your retailer/seller directly. Keep your proof of purchase for warranty claims.

A detailed user manual is available in PDF format: View User Manual (PDF)

Product Video Demonstration