K304E Secure KM Switch: 4-Port.

How to Order

The K304E is a secure 4-port KM Switch. It allows an easy yet secure sharing of keyboard and mouse between four different security-level sources/computers.

Built by design to provide highest possible isolation between four connected computers it includes a set of innovative features for a smooth, flexible user experience.
The HSL Virtual Display Technology (VDT) allows the K304E to switch seamlessly between computers once mouse cursor crosses display borders.Keyboard and Audio follow Mouse cursor and allow easy navigation between multiple displays.

The K304E arrives with a set of preset desktop configurations. In addition, HSL VDT application allows administrators to configure any desired display configuration, including both identical or different monitors'size and resolution.

The K304E works smoothly with all operating systems, from Microsoft to Linux and Apple with no need for software installation.

The K304E is equipped with an RDC port enabling user-friendly, comfortable remote control of the KVM switch.

Security is further leveraged by the inclusion of a USB user authentication port (DPP) that enables connecting a Biometric or Smart Card Reader, requiring the insertion of a physical authentication card or identification of a fingerprint to access the various computers/networks.

The K304E is a perfect fit for high-security organizations such as government agencies, military and financial institutions, and any other organization that handles sensitive and confidential information.

The products are fully compatible with EAL4+ and NIAP security requirements.


  • Virtual Display Technology (VDT):
    seamless keyboard, mouse and audio switching between computers once mouse cursor crosses display borders

  • Display configurations:
    product arrives with a predefined preset of display configurations for ease of use. In addition, HSL VDT application allows administrators to configure any desired display configuration required

  • Support for multiple-head:
    product can be easily configured to support dual/triple/multiple displays through HSL VDT application

  • OS Independent:
    support for all Microsoft OS, Linux and Apple with no need for SW installation

  • Biometric/Smart-Card reader support:
    Special secured port (DPP) for smart-card/biometric reader with patented Freeze function to support user authentication across multiple isolated networks

  • Highest security by design:
    Common Criteria EAL 4+ approved, compatible with NIAP security requirements

  • Hardware-based peripherals isolation:
    no dependency on firmware or software; all firmware on ROM (Read Only Memory); no keyboard buffering or memory

  • Unidirectional Optical Data Diodes:
    assuring USB peripherals isolation; data can flow from devices to host only

  • Peripherals Security:
    full USB device filtering to assure support for keyboard and mouse only

  • Active anti tampering system: 
    always-on with 10 years battery; holographic tampering evident labels  

K304E Secure KM Switch: 4-Port  

No. of Computers


Console Mouse and Keyboard Ports

2 * USB Type A, 2 * PS\2

Console DPP Port

USB Type A

Console Audio Jack

3.5mm Female

Computer/Keyboard Mouse Port (per Computer)

USB Type B

DPP Port (per Computer)

USB Type A

Computer Audio Jack (per Computer)

3.5mm Female


320 (W) x 130 (D) x 52 (H) mm / 12.8 (W) x 5.2 (D) x 2 (H) inches


2.08 Kg. (1.32 lbs.)

Power Requirements

12V DC, 1.5A (max) power adapter with center-pin-positive polarity

AC Input:

100 to 240VAC

Power Type


Operating Temperature

32° to 104° F (0° to 40° C)

Storage Temperature

-4° to 140° F (-20° to 60° C)


0-80% RH, non-condensing

Security Accreditation

Common Criteria EAL 4+ ALC_FLR.3

Product life-cycle

10 years


2 Years

  Drivers File Size Date
KM Multi Display Drivers

KM Multi Display Drivers

.OCTET-STREAM 6 MB 11 Jan, 2015

  Drivers File Size Date
KM Admin Tool

KM Admin Tool

.OCTET-STREAM 818 KB 11 Jan, 2015

  Specification Sheets File Size Date
K304, K304E & K308 4-8-port secure KM switches datasheet

This document provides the specifications for K304, K304E & K308 4-8-port secure KM switches.

873 KB 9 Feb, 2015

  Quick Start Guides File Size Date
KM Switches Quick Start Guide

KM Switches Quick Start Guide

480 KB 29 Dec, 2014

K304E - 4 Port High Security KM Switch, USB PS/2 keyboard and mouse, USB user authentication port, Audio out,  Active anti-tampering, Front panel push buttons, RDC Port, Field programmable              



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