Kramer K404F 20-00008490 HSL Secure KVM Combiner

Kramer K404F 20-00008490 HSL Secure KVM Combiner

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Quick Overview

Kramer K404F 20-00008490 HSL Secure KVM Combiner features:

  • DVI-D Support.
  • Heavy-Duty User Convenience - Works constantly and monitors multiple channels, no channel switching required.
  • Advanced Viewing Technology - View up to four simultaneous networks in real-time through a pixel-by-pixel video image; no quality loss, latency, reduced colors, dropped frames or artifacts.
  • Advanced Scaling Function - Allows user scaling of video source x 1/2 and x 1/4 to assure an optimized monitoring and working experience.
  • Tile and Scale Modes - Tile mode displays all source windows in equal size scaled by 50%. Scale mode allows users to focus on one main source while viewing the other sources scaled by 25%.
  • 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.
  • Future-Proof - Supports the latest keyboards, mice and all operating systems.
  • Highest Security by Design - Common Criteria EAL 4+ approved, compatible with NIAP security requirements.
  • Hardware-Based Peripheral Isolation - No dependency on firmware or software, all firmware on ROM (Read Only Memory), no keyboard buffering or memory.
  • Unidirectional Optical Data Diodes - Assures USB peripheral isolation, data flows from devices to host only.


The Kramer K404F 20-00008490 is a secure 4−port DVI−D KVM combiner that allows secure, simultaneous work and interaction with up to four computers. It is an essential tool for heavy−duty users challenged by frequent switching between isolated networks. The K404F integrates up to four isolated sources at different security levels into a single combined display. An RDC port enables user−friendly, comfortable remote control of the KVM switch. For enhanced security, a USB user authentication port (DPP) connects to a smart card or biometric reader. This requires the insertion of a physical authentication card or identification of a fingerprint to access the various computers/networks.


Additional Information

Product Spec Sheet