How to Order

KVM Combiner device models addressed in this page:

  • SC21H-N - 2-Port HDMI Video KVM Combiner



The KVM Combiner switch offered by HSL provides increased productivity in challenging multi-computer environments where users are required to view and interact with several computers at the same time. Optimize user experience while maintaining the highest isolation between computers and peripherals.

Obviate the need for purchasing and installing dedicated, per-computer peripheral sets.

Copy & Paste

Transfer text and files between all the computers that are connected to the KVM through the KVM (no network connection is needed between parties). Use standard copy and paste keyboard key combinations (CTRL+C / CTRL+V) or mouse context-menu commands to transfer data between computers that are connected to the KVM.

View and control multiple computers simultaneously

Present and work with up to 4 computers at the same time. Cascade combiners to view and control up to 16 (4x4) computers on a single or dual displays.


2-Port System Diagram



  • Interact with multiple computers presented on the same display at the same time using a single set of USB, audio, keyboard, video and mouse peripherals.
  • Freeze USB:
    Assign the USB port to a specific computer while switching the keyboard, video, mouse and audio between other computers. Useful for various scenarios, for instance, when a USB smart card reader  must remain mapped to a certain computer.
  • Smoothly switch between computers (Virtual Display Technology):
    Automatically switch control from one computer to another by dragging the mouse cursor over the computer’s display border. Peripherals switch to the next computer without hav‌ing to press any buttons once the mouse is passing the display border.
  • View applications in Ultra High Definition (UHD) 4K video quality:
    Never compromise on video quality. Run graphic-intensive, ultrahigh definition applications on all single and dual monitor KVM models.
  • Native touch screen support: 
    Interact with all the computers that are connected to the KVM Combiner using
    touch screen gestures. No need to install any driver or software.
  • Flexible screen layout: 
    Resize source scaling and aspect ratio to create Tile, Scale and Custom display layouts that fit user needs. Support screen duplication & extended screen view modes.



Part Number SC21H-N
No. of Sources 2
Console Ports
Displays 1 x HDMI 1.4
Max Output Resolution Supporting resolutions up to 1900x1200
Mouse & Keyboard USB Type A
Audio Jack 3.5 mm Jack
Microphone Jack 3.5 mm Jack
USB 3.0 Port N/A
Computer ports
Display Type 2 x HDMI 1.4
Max Input Resolution 1920x1200
Mouse and Keyboard USB Type B
Audio Jack 3.5 mm Jack
Microphone Jack 3.5 mm Jack
USB 3.0 Port N/A
  • Power input 100 to 240V AC External, 12V DC, 1.5A
  • Operating Temperature: 32° to 104° F (0° to 40° C)
  • Storage Temperature: -4° to 140° F (-20° to 60° C)
  • Humidity: 0-80% RH, non-condensing
  • Supported OS: Windows, Linux, Mac
Regulatory Compliance
  • CE, RCM, FCC class B, VCCI, TUV US, TUV Canada
Physical Characteristics
  • Dimensions: 177 x 82 x 35 mm / 6.9 x 3.2 x 1.3 inches
  • Device weight: 0.52 kg (1.1 lbs)
Warranty, reliability
  • Product life-cycle 10 years
  • Warranty 2 Years
  Installation Guides File Size Date
Installation Guide - 2 ports KVM Combiner Switches

This guide includes instructions for installing HSL SC21H-N KVM Combiner device.

939 KB 20 Feb, 2018

  Data Sheets File Size Date
Data Sheet - 2 Ports KVM Combiners Switches

This document provides the specifications for SC21H-N 2 Ports KVM Combiners Switches.

1 MB 20 Feb, 2018

Model Description CPN
SC21H-N 2-Port HDMI Video KVM Combiner CPN11458


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