Skip to content
Free Next Working Day Delivery On Orders Over £100 ex VAT.
Courier services operating with same-day dispatch, subject to network capacity.*
Availability:
47 in stock
Save £63.86 Save £63.86

£109.94 (Excl. VAT)

Current price - £131.93 (Inc. VAT)
£109.94 - £109.94
Current price- - £131.93
Availability:
47 in stock
  • Visa
  • Mastercard
  • American Express
  • Apple Pay
  • Google Pay
  • Paypal
  • Shop Pay
  • Klarna
  • Bank Transfer (BACS)
Trade pricing for verified resellers, proforma issued on official company letterhead for PO processing.
Education & Public Sector Pricing available for schools, universities, NHS, and government organisations. Contact our Public Sector Team on 020 8191 9223 or email info@screenmoove.com.
  • Description
  • Specifications
  • Downloads
  • StarTech 4-Port HDMI Switch 4K Fast Auto TAA | VS421HD4KA

    Create a powerful visual experience, with the ability to switch between four 4K video sources seamlessly. This 4-port HDMI® switch lets you share a monitor, projector or TV with four Ultra High Definition video sources, and switch between them with minimal disruption.

    VS421HD4KA

    Impressive image quality with 4K support
    The video switch maintains Ultra HD 4K picture quality while switching between content from HDMI source devices - including Blu-ray™ players and DVD players, computer systems, video game consoles, digital cable and satellite boxes and A/V receivers. 

    4K support ensures a higher level of image clarity and visibility, delivering four times the resolution of 1080p - 8.29 million pixels versus 2.07 million pixels. It provides a more engaging visual experience for audiences in a wide range of venues including conference centers, boardrooms, educational facilities, and commercial settings. With its exceptional resolution and image quality, it's also ideal for bringing your digital signage to life.

    Fast and easy operation
    Enjoy hassle-free operation with three switching modes:
    Fast auto-switching: ensures minimal time for switching between HDMI sources. The switch provides effortless operation with advanced auto-sensing - it detects the latest connected HDMI source and automatically switches to it. Auto-switching encourages collaboration among colleagues, by making it easy to share a projector or display. It also ensures no downtime in a digital signage application if a source signal is accidentally powered off or fails.

    Priority switching: identifies one port to take first priority for HDMI sources when multiple sources are connected, ideal for applications such as digital signage.
     
    Manual switching: enables you to manually select your HDMI source with front panel buttons that are easy to use.
    An IR remote control is included in the box, enabling you to select your desired input source remotely. The RS-232 serial control interface ensures easy remote operation with serial control enabled devices.

    Hassle-free setup with plug-and-play installation
    The switch also saves time during setup with EDID emulation, which ensures that all of your display settings, such as native resolution and refresh rate, are communicated between your display and video source devices. EDID emulation maximizes compatibility with your 4K display, ensuring a convenient plug-and-play installation and the sharpest image quality.

    The VS421HD4KA is TAA compliant and backed by a 2-year StarTech.com warranty with free lifetime technical support.

    Applications
    Share a 4K monitor, television or projector with four different 4K video sources to create a powerful visual experience in boardrooms, classrooms, home theaters, hotels, shopping malls, health centers and many other environments
    Collaborate easily with colleagues by connecting multiple users to the same display, and switch between input devices
    Enhance your home theater by connecting four A/V devices and automatically switching between your Blu-ray player, cable and satellite set-top boxes, gaming console or computer
    Switch easily between different video sources for digital signage applications - the switch is backward compatible with high-definition 1080p, so any video source will look great in your digital signage

  • Category Attribute Value
    Warranty Warranty 2 Years
    Connector(s) Connector A 1 - HDMI (19 pin)
    Connector B 4 - HDMI (19 pin), 1 - RJ-11
    Environmental Operating Temp 0°C to 40°C (32°F to 104°F)
    Storage Temp -10°C to 60°C (14°F to 140°F)
    Humidity 0% ~ 80%
    Hardware Ports 4
    AV Input HDMI
    AV Output HDMI
    Audio Yes
    Standards Industry Standards HDMI 1.4
    Indicators LED Indicators 4 active, 1 power
    Packaging Height 2.6 in (6.6 cm)
    Length 9.2 in (23.4 cm)
    Width 6.1 in (15.6 cm)
    Shipping Weight 1.8 lb (0.8 kg)
    Quantity 1
    Performance Max Resolution 4K @ 30Hz
    Supported Resolutions 3840x2160 to 1280x720
    Wide Screen Support Yes
    Physical Weight 10.3 oz (291 g)
    Color Black
    Material Steel
    Length 6.1 in (15.6 cm)
    Width 2.6 in (6.5 cm)
    Height 0.8 in (2.0 cm)
    Power Power Source AC Adapter Included
    Input Voltage 100 - 240V AC
    Output Voltage 12V DC
    Output Current 1.5 A
    Consumption 18W
    In the Box Included HDMI switch, remote, power adapter, RJ11 cable, serial adapter, mounting kit, guide
  • Description Downloads
    StarTech 4-Port HDMI Switch 4K Fast Auto TAA | VS421HD4KA DataSheet Downloads
    StarTech 4-Port HDMI Switch 4K Fast Auto TAA | VS421HD4KA Quick Install Guide Downloads
StarTech 4-Port HDMI Switch 4K Fast Auto TAA | VS421HD4KA
StarTech 4-Port HDMI Switch 4K Fast Auto TAA | VS421HD4KA
SKU: VS421HD4KA
StarTech 4-Port HDMI Switch 4K Fast Auto TAA | VS421HD4KA
SKU: VS421HD4KA

Book a Free Product Demo

Remote or on-site. No obligation.

Integrator or Installer?

Trade pricing, volume discounts, same-day collection.

Request a Trade Account

Education & Public Sector Solutions

Exclusive pricing, flexible terms, and dedicated support for schools, universities, NHS, and government organisations.

Official Purchase Orders We accept formal POs with VAT-compliant invoicing for all verified institutions.
Contract & Volume Discounts Competitive rates for multi-site, long-term, or framework-based deployments.
Dedicated Account Management Single point of contact for lead times, coordination, and sourcing.
Flexible 30-Day Terms Available to verified schools, councils, and government bodies.
Next-Day Delivery

Same-day shipping

Trade Account

Trade account available

Trusted Customers

See Our Latest Reviews

Public Sector Friendly

We Accept Purchase Orders

LATEST CASE STUDIES

See more
  • Woodys Case Study - Digital Signage
    January 14, 2026

    Digital Menu Boards with Custom Curved Mount Installation for Woodys, Andover

    HOSPITALITY • DIGITAL MENU BOARDS
    Four-screen digital menu boards installed for Woodys in Andover, featuring a bespoke curved mounting layout and CMS-controlled content for a bold, immersive menu experience.
    Client
    Woodys
    Location
    Andover
    Sector
    Hospitality, QSR
    Installation Date
    February 2025
    Solution
    Digital Menu Boards + CMS
    Products
    43" Digital Menu Boards
  • Digital Signage & Freestanding Display for Naan Staap, Leicester
    January 14, 2026

    Digital Signage & Freestanding Display for Naan Staap, Leicester

    HOSPITALITY • DIGITAL MENU BOARDS
    Multi-screen digital menu boards and floor-to-ceiling ultra-high-brightness window display installed for Naan Staap in Leicester, delivering clear menus and strong street-level visibility impact.
    Client
    Naan Staap
    Location
    Leicester
    Sector
    Hospitality, QSR
    Installation Date
    May 2025
    Solution
    Menu Boards + UHD Display
    Products
    32" Menu Boards & 49" Display
  • Digital Menu Boards and Window Displays for Karak Chaii
    January 14, 2026

    Digital Menu Boards and Window Displays for Karak Chaii

    HOSPITALITY • FOOD & DRINK
    Digital menu boards and window screens supplied for Karak Chaii in Birmingham, improving menu clarity, speeding ordering, and attracting increased street-level footfall for growth.
    Client
    Karak Chaii
    Location
    Birmingham
    Sector
    Hospitality, Café
    Completion Date
    March 2024
    Solution
    Menu Boards + Window Screens
    Products
    Menu Boards & Digital Window Screen
  • Digital Signage & Installation Service for Henkinz, St Albans
    January 14, 2026

    Digital Signage & Installation Service for Henkinz, St Albans

    HOSPITALITY • WINDOW DIGITAL SIGNAGE
    50-inch 4K window digital signage installed for Henkinz in St Albans, delivering high-impact street-facing promotions with simple USB plug-and-play content updates for retail visibility.
    Client
    Henkinz
    Location
    St Albans
    Sector
    Hospitality, QSR
    Installation Date
    May 2025
    Solution
    Digital Signage
    Products
    50" 4K Window Display
Trusted Store Status

Top Quality Store

Rating status, Exceptional, based on Google’s shopping experience metrics.
Exceptional

Why it matters

Demonstrates consistently strong fulfilment, service, and post-sale experience across Google signals.

Google
Top Quality Store
Built for confidence, next-day delivery options, UK-based support, trade-ready operations.
Request a quote

Have more questions ? Talk to our experts...

Need help choosing the right product?

Need help choosing the right product?

Speak directly with a dedicated Screen Moove expert and get the right solution, first time.

Call us on: 020 8191 9223
Email us: info@screenmoove.com

Contact us

Simply complete our contact form, and we will promptly respond to your inquiries.

If you have any questions or enquiry, please fill out the form below with all of your details and we'll get back to you shortly.