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2-Port HDMI® Automatic Switch ­ 4K

Product Overview

Front View

StarTech com VS221HD4KA 2 Port HDMI Automatic Switch 4K

  1. Input selection button
  2. Mode selection switch
  3. IR sensor

Rear View

StarTech com VS221HD4KA 2 Port HDMI Automatic Switch 4K - Rear View

  1. Power adapter port
  2. RJ-11 serial jack
  3. EDID copy button
  4. HDMI output port
  5. HDMI input ports (in1 & in2)
  6. EDID setting switch

For the latest information, technical specifications, and support for this product, please visit

Packaging contents

  • 1 x 2-port HDMI switch
  • 1 x remote control
  • 1 x universal power adapter (NA/EU/UK/AU)
  • 1 x RJ11 cable
  • 1 x RJ11 to DB-9 serial adapter
  • 1 x mounting kit
  • 1 x quick start guide

System requirements

  • 2 x HDMI enabled Video Source Device w/ HDMI cable (i.e. Blu-ray player, computer, etc.)
  • 1 x HDMI enabled Display Device w/ cable (i.e. Television, projector, etc.)
    Operating system requirements are subject to change. For the latest requirements, please visit


Note: Ensure your HDMI-enabled video source devices and the HDMI-enabled displays are powered off before you begin the installation.

  1. Connect an HDMI cable (not included) from each of the HDMI output ports on your HDMI source devices to the HDMI input the port on the HDMI switch.
    Notes: Each port is numbered, please take note of which number is assigned to each HDMI source device.
  2. Connect an HDMI cable (not included) from the output port on the HDMI Switch to your HDMI display device.
  3. Power on your HDMI display, followed by each of your HDMI source devices.
  4. Connect the included power adapter from an available power source to the power adapter port on the HDMI switch.
  5. (Optional for serial control) Connect the included RJ11 cable to the RJ11 to DB-9 serial adapter. Then connect the D9 connector to a 9-pin serial port on your computer system.
  6. Your HDMI switch is now ready for operation.


Automatic operation
The HDMI switch features automatic operation that allows the switch to automatically select the most recently activated or connected HDMI source device.
Simply connect a new device or turn on an already connected device to automatically switch video sources.
Priority operation
The HDMI switch features priority operation which will prioritize port 1 and port 2 respectfully. When you turn on the higher prioritized video source device (port-1), that video source will automatically be selected. Turning off the device will automatically switch back to the lower prioritized video source (port-2).

Manual operation
Manual mode enables you to switch between video sources with the push-button operation.
Manual operation with selection button
Press the input Selection button, on the front of the switch to toggle between each video source device.
The active port LED indicator will light as video sources are switched, indicating which port is selected.
Manual operation with remote control
Press 1 or 2 on the remote control to switch between HDMI ports in1 or in2 respectively.StarTech com VS221HD4KA 2 Port HDMI Automatic Switch 4K - remote control

Manual operation with serial control

  1. Configure the settings on your serial port below
    configuration: Baud
    Rate: 38400 bps Data
    Bits: 8
    Parity: None
    Stop Bits: 1
    Flow Control: None
  2. Open your terminal software to communicate through the serial port that the switch is connected to, and use the on-screen commands displayed to operate and configure your switch.

StarTech com VS221HD4KA 2 Port HDMI Automatic Switch 4K - remote control 1

FCC Compliance Statement

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and receiver.
  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  • Consult the dealer or an experienced radio/TV technician for help

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

  1. This device may not cause harmful interference, and
  2. this device must accept any interference received, including interference that may cause undesired operation.

Changes or modifications not expressly approved by could void the user’s authority to operate the equipment.

Use of Trademarks, Registered Trademarks, and other Protected Names and Symbols
This manual may make reference to trademarks, registered trademarks, and other protected names and/or symbols of third-party companies not related in any way to Where they occur these references are for illustrative purposes only and do not represent an endorsement of a product or service by, or an endorsement of the product(s) to which this manual applies by the third-party company in question. Regardless of any direct acknowledgment elsewhere in the body of this document, hereby acknowledges that all trademarks, registered trademarks, service marks, and other protected names and/or symbols contained in this manual and related documents are the property of their respective holders.
Technical Support’s lifetime technical support is an integral part of our commitment to providing industry-leading solutions. If you ever need help with your product, visit and access our comprehensive selection of online tools, documentation, and downloads.
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Warranty Information
This product is backed by a two-year warranty. warrants its products against defects in materials and workmanship for the periods noted, following the initial date of purchase. During this period, the products may be returned for repair or replacement with equivalent products at our discretion. The warranty covers parts and labor costs only. does not warrant its products from defects or damages arising from misuse, abuse, alteration, or
normal wear and tear.
Limitation of Liability
In no event shall the liability of Ltd. and USA LLP (or their officers, directors, employees, or agents) for any damages (whether direct or indirect, special, punitive, incidental, consequential, or otherwise), loss of profits, loss of business, or any pecuniary loss, arising out of or related to the use of the product exceed the actual price paid for the product. Some states do not allow the exclusion or limitation of incidental or consequential damages. If such laws apply, the limitations or exclusions contained in this statement may not apply to you.

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Documents / Resources

StarTech com VS221HD4KA 2-Port HDMI Automatic Switch 4K [pdf] User Guide
VS221HD4KA, 2-Port HDMI Automatic Switch 4K, Automatic Switch 4K, Automatic Switch, VS221HD4KA, Switch

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