Product images are provided for reference and may not represent the exact model, configuration, or included components.

No Bots, Just Experts

Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.

Description

StarTech 109B-USBC-HDMI USB-C to Dual HDMI Adapter

Overview

The StarTech 109B-USBC-HDMI adapter allows you to connect two independent HDMI displays to a single USB-C or USB-A port on your laptop or desktop. This is critical for users who need to expand their workspace with multiple high-resolution monitors for complex tasks like video editing, software development, or financial analysis. It supports 4K resolution at a smooth 60Hz on both displays simultaneously, ensuring fluid motion and sharp detail. The adapter also features 100W Power Delivery (PD) pass-through, meaning you can power your laptop through the adapter's USB-C port while it's connected, eliminating the need for a separate charger and simplifying your setup. This makes it ideal for mobile professionals and users with limited ports.

Compatibility

This adapter is compatible with any computer featuring a USB-C port that supports DisplayPort Alternate Mode (DP Alt Mode) or Thunderbolt 3/4. It also includes a USB-A to USB-C cable adapter, extending compatibility to older systems with USB-A ports, though 4K 60Hz output on both displays may be limited to 30Hz depending on the host system's USB 3.0 bandwidth capabilities. It supports Windows 10/11 and macOS 10.15 or later.

Installation Notes

Ensure your host device's USB-C port supports DisplayPort Alternate Mode (DP Alt Mode) for full 4K 60Hz functionality on both displays. For USB-A connections, the maximum resolution and refresh rate per display will be limited by the host's USB 3.0 bandwidth (typically 4K 30Hz). The 100W PD pass-through requires a USB-C PD charger connected to the adapter's USB-C PD input port.

What's in the Box

  • 1x USB-C to Dual HDMI Adapter
  • 1x USB-A to USB-C Cable Adapter
  • 1x Quick Start Guide
Specifications
Brand: StarTech
MPN: 109B-USBC-HDMI
Type: Power Supply
Connectivity: USB
Power: 100W
Q&A
Reviews
Have Questions?

StarTech Usb-c TO Dual-hdmi Adapter Usb-c OR A - 109B-USBC-HDMI

$104.54
$103.99

RELATED PRODUCTS

System Design, Deployment & Technical Support

Support services and planning resources for commercial surveillance, access control, and infrastructure deployments.

Fixed scope • Fixed price

System Design Assistance

  • Get help validating product compatibility
  • Coverage requirements
  • Storage planning and deployment architecture before you buy.
Request Design Help

Deployment & Configuration Support

  • Access fixed-scope support for rollout planning
  • User setup guidance
  • Migration and system standardization across single-site or multi-site deployments
View Support Services

Guides, Tools & Calculators

  • PoE requirements
  • Storage retention
  • Camera selection and deployment methodology
Open Technical Resources