Laptop Dock Satechi ST-U4MA3M USB Type-C Grey 100W Power Delivery

The Satechi USB4 Multiport Adapter with 8K HDMI (model ST-U4MA3M) expands a laptop's connectivity through a single USB‑C connection. It supports USB4 protocols for improved bandwidth management, an 8K-capable HDMI output, two 10 Gbps USB‑A data ports, one USB‑A 2.0 port, Gigabit Ethernet (1000 Mbit/s), SD and MicroSD card readers, and up to 100W USB‑C Power Delivery charging. The adapter features a grey finish and a rugged design to aid heat dissipation.

Advantages

The dock consolidates multiple ports into one compact adapter, enabling high-resolution display output up to 8K via HDMI while offering fast data transfer through USB‑A ports and card readers. Gigabit Ethernet provides stable wired network access and the 100W USB‑C PD port allows laptop charging while connected. Its sturdy construction improves thermal performance during extended use.

Suitable for

• Connecting external 8K/4K displays to a USB‑C/USB4 laptop
• Expanding ports for workstations with limited built‑in I/O
• Transferring data from SD and MicroSD cards
• Reliable wired network connections for video conferencing and large file transfers
• Charging a laptop or powering USB‑C devices while using peripherals

Key specifications

• Model: Satechi ST-U4MA3M
• Interface: USB‑C (USB4 protocols supported)
• HDMI: 1 × 8K-capable HDMI output (max refresh rate 60 Hz)
• USB‑A: 2 × USB 3.2 Gen 1 (10 Gbps) data ports, 1 × USB 2.0 port
• Card readers: SD and MicroSD slot
• Ethernet: 1 × Gigabit Ethernet (1000 Mbit/s)
• Power Delivery: Up to 100W USB‑C PD
• Colour: Grey

How to use

Connect the adapter to your laptop's USB‑C/USB4 port. Attach an HDMI cable from the adapter to an external display and configure the display settings on your computer if needed. Plug USB devices into the USB‑A ports, insert SD or MicroSD cards into the corresponding slots to transfer files, and connect an Ethernet cable for wired network access. Use the USB‑C PD port to connect a compatible 100W charger or to provide power from the host if supported.

Recommendations

For optimal video performance, use high-quality HDMI cables rated for the target resolution and ensure your laptop's USB‑C port supports the necessary video and bandwidth features of USB4. Keep ventilation around the adapter during extended heavy use to assist heat dissipation.