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Instruction Manual — USB4™ C-to-C Cable

This manual covers setup and features for the Satechi USB4™ C-to-C Cable (Model: ST-U4C80M / ST-U4C25M).

📄 Download User Manual — USB4™ C-to-C Cable · PDF · 1.2 MB

In the Box

USB4™ C-to-C Cable, User Manual.

Specifications

Model: ST-U4C80M / ST-U4C25M
Length: 80 cm (ST-U4C80M) or 25 cm / 10 in (ST-U4C25M)
Connector Type: USB-C to USB-C
Data Transfer Speed: 40Gbps
Max Power Delivery: Up to 100W
Video Output: Up to 8K/60Hz or 5K/60Hz (single display); 4K/60Hz (dual display)
Certification: USB4 Gen 2
Compatibility: Downward compatible with Thunderbolt 4, Thunderbolt 3, USB 3.2/3.1/3.0/2.0

Parts Reference

1. USB4 Connectors (40Gbps / 100W / 8K/60Hz) — USB-C connector at each end of the cable. One end connects to your host device (laptop, computer, or USB-C power source); the other connects to your peripheral, display, or device being charged.
2. Durable Braided Cable — The premium braided cable body, designed for durability and flexibility.

Setup

Step 1: Connect one end of the cable to your device (laptop, computer, or USB-C PD power adapter).
Step 2: Connect the other end to the peripheral, monitor, or device you want to power, charge, or transfer data to.
Step 3: If connecting to an external display, ensure your monitor's input is set to the correct HDMI or DisplayPort/Alt Mode source.

Important Notes

Power delivery: This cable supports up to 100W USB Power Delivery. Both the power adapter and device must support the required wattage.

Video output: Video output: up to 8K/60Hz or 5K/60Hz on a single display, or 4K/60Hz on dual displays (requires compatible host and displays).

Backward compatible: Downward compatible with Thunderbolt 4, Thunderbolt 3, USB 3.2/3.1/3.0/2.0. Full speed requires both ends to support USB4 Gen 2.

Frequently Asked Questions

Can this cable charge a laptop?
Yes. This cable supports up to Up to 100W USB Power Delivery. Both your power adapter and laptop must support the required wattage for maximum charging speed.

Can I connect an external monitor with this cable?
Yes. This cable supports video output: Up to 8K/60Hz or 5K/60Hz (single display); 4K/60Hz (dual display). Your host computer must have a compatible GPU and display output.

Does this work with older USB-C devices?
Yes. Downward compatible with Thunderbolt 4, Thunderbolt 3, USB 3.2/3.1/3.0/2.0.

Safety Instructions

Warning: Fire, electric shock, or damage could occur if the following instructions are not obeyed.

1. Do not bend, kink, or pinch the cable sharply.
2. Keep away from liquids and moisture.
3. Do not use if the cable or connectors are damaged or frayed.
4. Do not force connectors — ensure correct alignment before inserting.

Need Help?

Contact Satechi Support at support.satechi.com or email support@satechi.com.
Phone: +1 858 268 1800 | Website: www.satechi.com