Introduction
The Belkin Thunderbolt 2 Express HD Dock is designed to expand the connectivity of your laptop, providing a single-cable solution for connecting multiple peripherals. This dock utilizes Thunderbolt 2 technology to deliver high-speed data transfers and supports dual display configurations, including 4K cinema resolution on one display. It is compatible with both Mac and PC systems, streamlining your workspace by consolidating various connections through one Thunderbolt cable.
Setup
Follow these steps to set up your Belkin Thunderbolt 2 Express HD Dock:
- Connect Power: Plug the included power adapter into the dock's DC IN 12V 6A port and then into a power outlet.
- Connect to Computer: Use the provided 1-meter Thunderbolt cable to connect one of the Thunderbolt 2 ports on the dock to a Thunderbolt port on your Mac or PC.
- Connect Peripherals: Connect your desired devices to the available ports on the dock. This includes USB 3.0 devices, Ethernet cables, HDMI displays, and audio devices.
- Operating System Requirements: Ensure your computer is running Mac OS X v10.9 or later, or Windows 7 or 8 for optimal compatibility and performance.

Image: Rear view of the Belkin Thunderbolt 2 Express HD Dock, illustrating the Ethernet, audio, USB 3.0, Thunderbolt 2, HDMI, and power input ports.

Image: An overhead view of a desk setup showing the Belkin Thunderbolt 2 Express HD Dock connected to a laptop, external monitors, speakers, and other peripherals, demonstrating a streamlined workspace.
Operating Instructions
Once the dock is set up, it provides enhanced functionality for your computer:
- High-Speed Data Transfer: The Thunderbolt 2 technology enables data transfer speeds of up to 20 Gbps, significantly faster than USB 3.0 or FireWire 800.
- Dual Display Support: Connect up to two external displays. The dock supports 4K cinema resolution on one display. Note that at least one display must be Thunderbolt or Thunderbolt 2 technology-ready for dual display setups. The dock supports either HDMI or Mini DisplayPort, but not both simultaneously.
- Daisy Chaining: You can connect up to 8 separate devices through a single Thunderbolt cable to your computer, and daisy chain up to 4 additional Thunderbolt devices (5 total) from the dock.
- Port Functionality: The dock includes three USB 3.0 ports, two Thunderbolt 2 ports, one HDMI port, one Ethernet port, an audio out port, and an additional audio out port with mic support.
- Audio Output: If using the audio ports, you may need to select "USB audio CODEC" as the output device in your computer's sound settings.

Image: Front view of the Belkin Thunderbolt 2 Express HD Dock, highlighting the accessible USB 3.0 port and headphone jack for convenient connectivity.
Maintenance
To ensure the longevity and optimal performance of your Belkin Thunderbolt 2 Express HD Dock, follow these maintenance guidelines:
- Cleaning: Gently wipe the exterior of the dock with a soft, dry, lint-free cloth. Avoid using harsh chemicals, solvents, or abrasive cleaners.
- Ventilation: Ensure that the dock's ventilation openings are not obstructed. Proper airflow prevents overheating.
- Environment: Operate the dock in a clean, dry environment, away from extreme temperatures, direct sunlight, and excessive moisture.
- Cable Management: Keep cables organized and free from kinks or excessive bending to prevent damage to the cables and ports.
Troubleshooting
If you encounter issues with your Belkin Thunderbolt 2 Express HD Dock, refer to the following common solutions:
- No Display Output:
- Verify that all display cables (HDMI, Thunderbolt/Mini DisplayPort) are securely connected to both the dock and the monitor.
- Ensure your computer's display settings are configured to detect and extend to the external monitor(s).
- Remember that for dual displays, at least one display must be Thunderbolt or Thunderbolt 2 compatible. The dock supports either HDMI or Mini DisplayPort, but not both simultaneously.
- Peripherals Not Recognized:
- Check that the peripheral is properly connected to a USB 3.0 port on the dock.
- Ensure the dock is securely connected to your computer via the Thunderbolt cable.
- Try connecting the peripheral directly to your computer to rule out a device issue.
- Update your computer's operating system and drivers.
- Audio Issues:
- In your computer's sound settings, ensure that "USB audio CODEC" or a similar option is selected as the output device.
- Check the physical connection of your headphones or speakers to the dock's audio jack.
- Slow Data Transfer Speeds:
- Confirm that you are using a Thunderbolt 2 compatible cable and that both the dock and your computer support Thunderbolt 2.
- Ensure that the connected storage device also supports high-speed data transfer.
- Dock Not Powering On:
- Verify that the power adapter is securely connected to both the dock and a working power outlet.
- Check the power indicator light on the dock.
Specifications
| Product Dimensions | 12.5 x 7.4 x 3.2 inches |
| Item Weight | 0.01 ounces |
| Model Number | F4U085tt |
| Brand | Belkin |
| Color | Silver |
| Hardware Interface | Thunderbolt, USB 3.0 |
| Compatible Devices | PC; Mac |
| Total USB Ports | 3 (USB 3.0) |
| Total Thunderbolt Ports | 2 (Thunderbolt 2) |
| Total HDMI Ports | 1 |
| Ethernet Port | 1 |
| Audio Ports | 1 Audio Out, 1 Audio Out with Mic |
| Data Transfer Speed | Up to 20 Gbps (Thunderbolt 2) |
| Display Support | Dual displays, 4K cinema resolution on one display |
| UPC | 745883671922 |
Warranty Information
This Belkin product is covered by a manufacturer's limited warranty. For specific details regarding the warranty period, coverage, and terms and conditions, please refer to the warranty documentation included with your purchase or visit the official Belkin website. Keep your proof of purchase for warranty claims.
Support
For further assistance, technical support, or to access additional resources for your Belkin Thunderbolt 2 Express HD Dock (F4U085tt), please visit the official Belkin support website. You can typically find FAQs, driver downloads, and contact information for customer service there.