Electronics / USB Hubs & Docking
User Manual for StarTech 115B-USBC-MULTIPORT USB-C Multiport Adapter
Quick-start guide for the StarTech 115B-USBC-MULTIPORT USB-C Multiport Adapter. Learn how to connect your devices, use the card readers, HDMI output, and power delivery features.
Table of contents
Quick Guide
The StarTech 115B-USBC-MULTIPORT is a USB-C multiport adapter designed to expand your computer's connectivity. It provides HDMI video output, USB-A data ports, SD/MicroSD card readers, Gigabit Ethernet, and power delivery pass-through. The device is plug-and-play, meaning your computer will automatically detect it and install the necessary drivers upon connection.
Device Overview
The adapter features several ports for various peripherals:
- Built-in USB-C Host Cable: Connects to your host computer. Supports USB 3.1 Gen 1 (5Gbps) and Power Delivery 3.0.
- USB-C DATA/100W Power Delivery Port: Used for connecting a USB-C power adapter or peripherals. Supports up to 100W power delivery.
- Card Readers: Includes slots for SD and MicroSD cards.
- HDMI Output Port: Supports HDMI 2.0b HDR10, up to 4K at 60Hz via DisplayPort 1.4 DP Alt Mode.
- USB-A Data Ports: Three ports for USB-A peripherals, supporting USB 3.1 Gen 1 (5Gbps).
- Gb Ethernet Port: Supports 10/100/1000Mbps network connections.
Installation
- Connect the built-in USB-C host cable to a USB-C port on your host computer.
- To charge your laptop, connect a USB-C power adapter (up to 100W) to the USB-C DATA/100W Power Delivery Port on the adapter.
- Connect your HDMI display device to the HDMI Output Port.
- Connect USB-A peripherals to the USB-A Data Ports.
- Connect a CAT 5e or CAT 6 cable to the Gb Ethernet Port for a wired network connection.
Power Delivery
The adapter supports Power Delivery 3.0. When a power adapter is connected to the USB-C pass-through port, the adapter reserves 15W of power for its own operation, leaving up to 85W available for charging your connected laptop.
Card Readers
The adapter includes both SD and MicroSD card slots. Please note the following limitations:
- Only a single card slot can work at a time.
- The adapter prioritizes the SD slot over the MicroSD slot.
- Always safely unmount (eject) the card within your computer's operating system before physically removing it from the adapter to prevent data loss.
Technical Notes
For video output, your computer's USB-C port must support DisplayPort (DP) Alt Mode. Video performance, including resolution and refresh rate, depends on your host computer's video controller and support for DisplayPort 1.4 (DSC).
Practical help
Common problems
Video output is not working
Ensure your host computer's USB-C port supports DisplayPort (DP) Alt Mode.
Memory card is not recognized
Ensure only one card is inserted at a time. If both are inserted, the adapter prioritizes the SD slot.
Laptop is not charging or charging slowly
The adapter reserves 15W for itself. Ensure your power adapter provides sufficient wattage (up to 100W) to cover the 15W overhead plus your laptop's requirements.
Before use
- Verify host computer USB-C port supports DP Alt Mode for video.
- Connect the built-in USB-C cable to the host computer.
- Connect a USB-C power adapter to the pass-through port if charging is required.
- Safely eject memory cards in the OS before removal.
Specs in practice
- Power Delivery
- Supports up to 100W input; 15W is reserved for the adapter, leaving up to 85W for the host device.
Model compatibility
- Requires host computer USB-C port with DP Alt Mode support for video output.
- SD card slot is prioritized over MicroSD slot.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.