Introduction
The Lemorele TC21 USB-C to Dual HDMI Adapter is designed to expand your display capabilities, allowing you to connect USB-C enabled laptops, tablets, and smartphones to one or two HDMI displays. This adapter supports both screen mirroring and extended desktop modes, delivering high-resolution video output for enhanced productivity and entertainment.

Package Contents
- 1 x Lemorele TC21 USB-C to Dual HDMI Adapter
- 1 x User Manual (this document)

Setup Instructions
- Connect to Source Device: Plug the USB-C connector of the adapter into the USB-C port of your laptop, tablet, or smartphone. Ensure your device's USB-C port supports video output (DisplayPort Alternate Mode).
- Connect to Display(s):
- For a single display: Connect one HDMI cable from an HDMI port on the adapter (labeled HD1 or HD2) to the HDMI input of your TV, monitor, or projector.
- For dual displays: Connect two HDMI cables from both HDMI ports on the adapter (HD1 and HD2) to the HDMI inputs of your two external displays.
- Power On Displays: Ensure your external display(s) are powered on and set to the correct HDMI input source.
- Automatic Detection: The adapter is Plug & Play. Your device should automatically detect the connected display(s) and configure the display settings.


Operating Instructions
The adapter supports two primary display modes:
1. Mirror Mode
In Mirror Mode, your external display(s) will show the exact same content as your source device's screen. This is ideal for presentations, sharing videos, or displaying content on a larger screen.
- Supported Systems: Android, Mac OS, Windows.
- Configuration: Typically, your operating system's display settings will allow you to select "Duplicate" or "Mirror Displays."
2. Extended Mode
In Extended Mode, your external display(s) act as an extension of your source device's screen, providing more desktop space. This is perfect for multitasking, allowing you to work on one screen while viewing other content on another.
- Supported Systems:
- Windows: Supports Extended Mode where the laptop, HD1, and HD2 can all display different content (e.g., A, B, C).
- Mac OS: Supports Extended Mode where the external displays mirror each other but are extended from the laptop (e.g., A, B, B). Mac OS does not support displaying three distinct contents (A, B, C) with this adapter.
- Configuration: In your operating system's display settings, select "Extend these displays." You can then arrange the displays as desired.



Video 1: Demonstration of Lemorele TC21 Adapter Features
Maintenance
- Keep the adapter in a dry environment and away from direct sunlight.
- Avoid bending the cable excessively or applying undue stress to the connectors.
- Clean the adapter with a soft, dry cloth. Do not use liquid cleaners or solvents.
- Store the adapter in a protective case or bag when not in use, especially during travel, to prevent physical damage.

Troubleshooting
- No Display/Flickering Screen:
- Ensure all cables are securely connected.
- Verify that your source device's USB-C port supports video output (DisplayPort Alternate Mode). Not all USB-C ports support this feature.
- Check your display settings on your source device to ensure the output is enabled and configured correctly (e.g., Mirror or Extend).
- Try connecting to a different HDMI port on your display or a different display altogether to rule out display issues.
- Restart your source device.
- Resolution Issues:
- When using a single HDMI output, the adapter supports up to 4K@60Hz for a clear image without delay.
- When using two HDMI outputs simultaneously, the maximum resolution supported is 4K*2K@30Hz. Ensure your displays and source device are configured for this resolution.
- Adjust the display resolution in your operating system's settings.
- Extended Mode not working on Mac OS with three distinct displays:
- The adapter supports Extended Mode on Mac OS where the external displays mirror each other but are extended from the laptop (A, B, B). It does not support displaying three distinct contents (A, B, C) on Mac OS. This feature is typically available only on Windows systems.


Specifications
| Feature | Description |
|---|---|
| Brand | Lemorele |
| Model | TC21 |
| Connector A | USB Type-C (Male) |
| Connector B | HDMI-Compatible (Female) x 2 |
| Max Resolution (Single HDMI) | 4K (3840x2160) @ 60Hz |
| Max Resolution (Dual HDMI) | 4K (3840x2160) @ 30Hz |
| Display Modes | Mirror, Extend (Windows: A+B+C; Mac OS: A+B+B) |
| Power Source | Bus-powered (No external power required) |
| Dimensions (Adapter Body) | Approx. 1.88 in (4.77 cm) W x 1.69 in (4.29 cm) H |
| Cable Length | Approx. 6.02 in (15.29 cm) |
| Weight | Approx. 0.068 kg |
| Certification | CE |

User Tips
- For optimal performance, ensure your USB-C source device has a fully functional USB-C port that supports DisplayPort Alternate Mode (Alt Mode).
- When using dual monitors, be aware of the 4K@30Hz resolution limit to avoid display issues.
- If you experience any lag or display issues, try reducing the resolution or refresh rate in your device's display settings.
- Keep your device's graphics drivers updated for best compatibility and performance.
Warranty and Support
For warranty information and technical support, please refer to the official Lemorele website or contact their customer service directly. Keep your purchase receipt for warranty claims.