StarTech 4-Port HDMI 4K Automatic Video Switch with MHL Support

StarTech 4-Port HDMI 4K Automatic Video Switch with MHL Support
Special Order
Expected availability: 7-10 business days
Protect your Gear
Add a protection plan from $8.99

True Know-How

Ask Our Experts


StarTech VS421 Overview

  • 1Description
  • 2High-Quality Picture with 4K Support
  • 3Solid Aluminum Housing Ensures Fixed Positioning
  • 4Hassle-Free Operation with Auto Switching & EDID
  • 5General
  • 6Applications

The 4-Port HDMI Automatic Video Switch from StarTech allows you to share a display or projector with four HDMI-enabled video source devices. The switch features four independent inputs, each supporting up to UHD 4K resolution and 7.1 surround sound audio. The switch also features MHL support on input port 1, enabling video output video from MHL-enabled mobile devices such as Samsung Galaxy tablets and smartphones.

High-Quality Picture with 4K Support

  • UHD 4K is supported by the latest A/V devices and delivers four times the resolution of 1080p
  • As the switch is backward compatible with high-definition 1080p, all video sources can be supported by digital signage application

Solid Aluminum Housing Ensures Fixed Positioning

  • Constructed of solid aluminum, the HDMI switch is durable and heavy enough to prevent the unit from lifting or sliding around if the attached HDMI cables are bumped or shifted
  • Its small footprint makes it easy to integrate the switch into any boardroom, classroom, home theater, or digital signage application

Hassle-Free Operation with Auto Switching & EDID

  • Ensures easy operation with automatic switching that detects and selects a newly connected device
  • Automatic switching encourages on-the-fly collaboration among colleagues, by making it easy to share your projector between multiple source devices in a boardroom or classroom environment
  • Supports manual operation using the included IR remote control, or the built-in front panel toggle switch directly on the device
  • Saves time during setup with EDID emulation, ensuring that all your native settings—such as resolution and refresh rate—are communicated between your display and source devices
  • EDID emulation maximizes compatibility with your 4K display, ensuring a convenient plug-and-play installation


  • 4x1 HDMI switch with MHL support
  • IR remote control included
  • 7.1 surround sound audio
  • Small footprint
  • Front panel toggle switch button


  • Share a 4K television or projector with two different UHD 4K video sources
  • Collaborate with colleagues by connecting multiple users to the same display, and switch between input devices
  • Use in digital signage applications to display multiple source devices at different times
  • Use in your home theater to connect two A/V devices, such as Blu-ray players, cable/satellite set-top boxes, and computers to your television
UPC: 065030859653

StarTech VS421 Specs

4 x HDMI 1.4 type A, female

1 x HDMI 1.4 type A, female
Audio Specifications7.1 surround sound
Maximum Digital Resolutions4K @ 30 Hz
Supported Resolutions3840 x 2160 (UHD 4K)
2560 x 1600
1920 x 1200
1920 x 1080p
1280 x 720p
Wide Screen SupportedYes
LED IndicatorsPower
Port selected (1/2/3/4)
Center Tip PolarityPositive
Input Current1 A
Input Voltage100 to 240 VAC
Output Current3 A
Output Voltage12 VDC
Power SourceAC adapter, Included
Humidity5 to 90%
Operating Temperature32 to 158°F / 0 to 70°C
Storage Temperature14 to 176°F / -10 to 80°C
Dimensions0.6 x 5.5 x 3.3" / 1.4 x 14 x 8.5 cm
Weight9.7 oz / 274 g
Packaging Info
Package Weight1.4 lb
Box Dimensions (LxWxH)9 x 6.1 x 2.2"
See any errors on this page? Let us know