Introduction
The ULT-unite USB4 Type-C Extension Cable is designed to extend the reach of your USB-C and Thunderbolt 3/4 connections, providing high-speed data transfer, robust power delivery, and stunning video output. This manual provides essential information for setting up, operating, and maintaining your extension cable to ensure optimal performance and longevity.
Setup
To use your ULT-unite USB4 Type-C Extension Cable, follow these simple steps:
- Connect the Male End: Plug the male USB-C connector of the extension cable into the USB-C or Thunderbolt port of your host device (e.g., laptop, desktop PC, tablet).
- Connect Your Peripheral: Plug the USB-C or Thunderbolt cable from your peripheral device (e.g., external display, SSD, charging cable) into the female USB-C port of the extension cable.
- Verify Connection: Ensure both connections are secure. Your device should recognize the connected peripheral or begin charging.

Operating Instructions
This extension cable supports multiple high-performance functions:
- 100W Fast Charging: The cable is equipped with an E-marker chip to safely deliver up to 100W (20V 5A) of power. This allows for rapid charging of compatible USB-C devices. Note that actual charging speed depends on your device and charger capabilities.
- 40Gbps SuperSpeed Data Transfer: Experience ultra-fast data transfer speeds of up to 40 Gigabits per second. This is ideal for transferring large files, such as music, movies, or entire seasons of TV shows, in a matter of seconds.
- 8K@60Hz Video Output: Connect your device to an external display and enjoy stunning video content. The cable supports a single screen at 8K resolution at 60Hz, or two screens at 4K resolution simultaneously.
- Universal Compatibility: This cable is backward compatible with all USB protocols (USB 3.2/3.1/3.0/2.0) and is also compatible with Thunderbolt 3 and Thunderbolt 4 devices. It is ideal for new Thunderbolt devices, including docking stations, cables, laptops, and the iPad Pro 2021.




Maintenance
To ensure the longevity and optimal performance of your ULT-unite USB4 Type-C Extension Cable, please follow these maintenance guidelines:
- General Care: Keep the cable clean and free from dust and debris. Avoid exposing it to extreme temperatures or direct sunlight.
- Avoid Excessive Bending: While durable, avoid sharp bends or kinks in the cable, especially near the connectors, to prevent internal damage.
- Proper Disconnection: Always grasp the connector housing when plugging or unplugging the cable, rather than pulling on the cable itself.
- Port Protection: The extension cable is designed to protect the port of your device from wear and tear caused by frequent plugging and unplugging.

The cable features a nickel-plated connector with a lifespan of up to 10,000 mating cycles, integrated molding technology for a seamless and durable housing, and superior construction with silver-clad and tinned copper conductors combined with multi-shielding for high performance.


Troubleshooting
- Limited Performance with Longer Extensions: Due to the nature of USB4 40Gbps, it is recommended that the total length of the cable setup (including the extension cable and any connected cables) does not exceed 1.2 meters for the highest performance.
- Incompatibility with Certain Hubs: This USB4 extension cable may be incompatible or unusable when connecting to certain USB hubs. If you experience issues, try connecting directly or using a different hub.
- No Power Delivery/Slow Charging: Ensure both your host device and the charger/power source support 100W Power Delivery. Check that all connections are secure.
- No Video Output: Verify that your host device and display support video output over USB-C/Thunderbolt. Ensure the display input is set correctly.
- No Data Transfer: Check that your peripheral device is properly connected and powered. Ensure your host device's drivers are up to date.
Specifications
| Feature | Specification |
|---|---|
| Brand Name | ULT-unite |
| Model Number | 4041-9157 |
| Item Name | USB4 Extension Cable |
| Type | Type-C USB 4 Extender Cable |
| USB Type | USB 4 Type-C |
| Connector | USB4 connector |
| Function | 5A Fast Charging |
| Color | Gray |
| Conductor | Coaxial Cable |
| Material | Silver-clad Copper + Tinned Copper |
| Shielding | Combination |
| Data Transfer Rate | 40Gbps |
| Power Delivery | 100W |
| Resolution | 8K@60Hz (Max) |
| Certification | CE, FCC, RoHS, USB-IF Member |
| Package | Polybag |
| Use Cases | MP3 / MP4 Player, Camera, Mobile Storage, Computer, Smart Devices, IP Camera, Set-top Boxes, Robot |
| Female Connector Dimensions | Length: 41mm, Width: 12.2mm, Thickness: 6.3mm |
| Male Connector Dimensions | Width: 12.2mm, Thickness: 6.3mm |
| Cable Diameter | 5.5mm |


User Tips
- PC Compatibility: This cable is compatible with PCs that feature a USB-C or Thunderbolt port. Ensure your PC's port supports the desired functions (data, video, power) for optimal performance.
- HomePod Mini Usage: While the cable can be used to charge devices like the HomePod Mini via its USB-C port, its advanced data and video features are dependent on the capabilities of the connected device.
- Optimal Length: For best performance, especially with 40Gbps data transfer, keep the total cable length (extension + connected cable) under 1.2 meters.
Warranty and Support
For any questions, technical support, or warranty inquiries regarding your ULT-unite USB4 Type-C Extension Cable, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.





