Kramer HSL Secure KVM Combiner/4-Port/DVI-D Video

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HOST INPUT PORTS: 4 DVI-D (F) connectors, 4 USB-B connector for keyboard and mouse, 4 3.5mm mini jack for unbalanced stereo audio, 4 USB-B dedicated peripheral ports (DPP).
CONSOLE PORTS: 1 DVI-D (F) connector, 2 USB-A connectors for keyboard and mouse, 1 USB-A dedicated peripheral port (DPP), 2 DIN-5 connectors for PS/2 keyboard and mouse,1 3.5mm mini jack for unbalanced stereo audio, 1 RJ-45 remote desktop controller port (RDC).
CHANNEL SWITCHING: Front panel buttons, remote desktop controller (RDC) (optional).
SUPPORTED VIDEO MODES: Single-link DVI resolutions up to 1920x1200.
OPERATING TEMPERATURE: 0° to +40°C (32° to 104°F).
STORAGE TEMPERATURE: -40° to +60°C (-40° to 140°F).
HUMIDITY: 10% to 90%, RHL non-condensing.
DIMENSIONS: 32.0cm x 13.0cm x 5.2cm (12.6" x 5.1" x 2") W, D, H.

The K404F 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.


  • 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.
  • Peripheral 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. Built-in keylock.

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