1. Introduction
Thank you for choosing the Alxum USB C Bi-Directional Switch. This device allows you to efficiently manage your USB-C connections, enabling either two USB-C video sources to share one display, or one USB-C source to switch between two displays. It supports high-resolution video up to 8K@60Hz, fast data transfer at 10Gbps, and power delivery up to 100W. This manual provides detailed instructions for proper setup, operation, and maintenance of your switch.
2. Package Contents
Please verify that all items are present in your package:
- 1 x Alxum USB C Bi-Directional Switch
- 2 x USB C to C Cables (1 meter each)
- 1 x 5V1A Power Adapter
- 1 x USB A to C Cable (1 meter)
- 1 x User Manual
3. Product Features
- Bi-Directional Functionality: Supports 2 input to 1 output, or 1 input to 2 output configurations.
- High Resolution Video: Delivers up to 8K@60Hz, 4K@120Hz, and 1080P@165Hz video output.
- Fast Data Transfer: Achieves speeds up to 10Gbps (USB 3.1 Gen2).
- Power Delivery: Supports fast charging up to 100W.
- User-Friendly Design: Features an LED indicator for active device status and a one-click button for easy switching.
- Broad Compatibility: Compatible with Windows, Mac OS, and Linux systems, and various USB-C devices including laptops, smartphones, tablets, and gaming consoles.
- Driver-Free: Plug and play operation, no additional drivers required.
- Durable Construction: Aluminum shell designed for efficient heat dissipation.
4. Setup Instructions
Follow these steps to set up your Alxum USB C Bi-Directional Switch:
- Connect Power: Always connect the included 5V1A power adapter to the DC 5.0V port on the switch first. This ensures stable and efficient operation.
- Choose Your Configuration:
a. 2 Inputs to 1 Output (Sharing one display between two sources):
Connect two USB-C source devices (e.g., laptops) to the two input ports (labeled A and B) on the switch using the provided USB C to C cables. Connect your display (e.g., monitor, projector) to the output port of the switch.
Image: Diagram illustrating the 2 Input to 1 Output configuration, where two source devices (laptops) share a single display.
b. 1 Input to 2 Outputs (Switching one source between two displays):
Connect one USB-C source device (e.g., laptop) to one of the input ports (labeled A or B) on the switch. Connect two displays (e.g., monitors) to the two output ports of the switch. Note: Only one display can be active at a time in this configuration.
Image: Diagram illustrating the 1 Input to 2 Output configuration, where one source device (laptop) can switch between two displays.
- Connect Peripherals (Optional): If your setup involves data transfer or charging, ensure your devices and cables support the desired speeds and power levels. For 10Gbps data transfer, the maximum recommended length for downstream USB-C to USB-C cables is 1-2 meters.
Important Notes:
- This product does not support displays with Thunderbolt interfaces, such as the MAC Studio Display.
- Do not connect Thunderbolt Docking Stations or Thunderbolt Hard Drive Enclosures to this switch.
- Ensure all connected devices and cables support the desired resolution (e.g., 8K@60Hz) and power delivery (e.g., 100W) for optimal performance.
5. Operating Instructions
Using the Alxum USB C Bi-Directional Switch is straightforward:
- Switching Devices: Press the button on the top of the switch to toggle between the connected input/output devices.
- LED Indicator: The LED indicator light will illuminate to show which device or port is currently active.
- Power Delivery and Data Transfer: When multiple devices are connected, only one computer can be charged via Power Delivery (PD) or read data from an external hard drive enclosure at a time. Use the switch button to select the active device for these functions.

Image: Diagram illustrating that only one computer can receive power via PD at a time.

Image: Diagram illustrating that only one computer can read data from an external hard drive at a time.
6. Maintenance
To ensure the longevity and optimal performance of your Alxum USB C Bi-Directional Switch:
- Keep the device in a dry environment, away from moisture and extreme temperatures.
- Clean the device with a soft, dry cloth. Avoid using liquid cleaners or solvents.
- Avoid dropping or subjecting the device to strong impacts.
- Ensure proper ventilation around the switch to prevent overheating.
7. Troubleshooting
If you encounter issues with your Alxum USB C Bi-Directional Switch, please refer to the following common solutions:
- No Display/Intermittent Connection:
- Ensure the 5V1A power adapter is securely connected to the switch.
- Verify that all USB-C cables are properly connected and are not damaged.
- Confirm that your display and source devices are compatible and not using Thunderbolt interfaces.
- Try using the included Alxum USB C to C cables, as some third-party cables may not fully support the required specifications.
- Restart your source devices and display.
- Charging or Data Transfer Issues:
- Remember that only one computer can be charged or access data at a time. Use the switch button to select the desired device.
- Ensure your source device, display (for reverse charging), and cables support the specified fast charging (100W) and data transfer (10Gbps) rates.
- For 10Gbps data transfer, ensure the USB-C to USB-C cable length does not exceed 1-2 meters.
- Flickering Display:
- This can occur if using unsupported devices like Thunderbolt hubs, cable extenders, or couplers. Connect directly using the provided cables.
- Ensure your display's refresh rate and resolution settings are compatible with the switch's capabilities (up to 8K@60Hz).
If these steps do not resolve your issue, please contact Alxum customer support for further assistance.
8. Specifications
| Model Number | D1078A |
| Product Dimensions | 1.97 x 1.97 x 0.79 inches |
| Item Weight | 8.8 ounces |
| Connector Type | USB Type-C |
| Video Resolution | Up to 8K@60Hz, 4K@120Hz, 1080P@165Hz |
| Data Transfer Speed | 10Gbps (USB 3.1 Gen2) |
| Power Delivery | Up to 100W |
| Compatible Devices | Gaming Console, Laptop, Smartphone, Tablet |
| Operating Systems | Windows 11/10/8.1/8/7/Vista/XP, Mac OS, Linux |
9. Warranty and Support
Alxum provides a 2-year warranty for this product. If you have any product questions, require technical support, or need assistance during the purchase or usage process, please feel free to contact us.
You can reach our customer support by clicking on the seller's name in the "Sold By" section of the product detail page on Amazon.

Image: The Alxum USB C switch in an active setup, demonstrating its capabilities for fast charging and stable operation while noting compatibility limitations with Thunderbolt peripherals.





