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Black rectangular KVM switch with front panel ports and buttons

Kramer Electronics

Kramer Electronics DK42HU-N 4-Port Dual Head 4K30 HDMI KVM Switch

SKU CH-QN0M-X6Z5A

Switches keyboard, mouse, dual 4K30 displays, audio and USB 3.0 across four computers while keeping one USB port locked to a single system

  • Dual-head 4K30 UHD at 3840x2160 30Hz for sharp visuals
  • Four computers share one keyboard, mouse and dual displays
  • Assign a USB port to a specific PC while switching other peripherals
  • SuperSpeed USB 3.0 port enables rapid data transfer and device charging
  • Freeze Audio keeps sound on one system while you control another

Dual Head 4-Port KVM Switch

The Kramer Electronics DK42HU-N is a dual head 4-port KVM switch built for users who need to share one keyboard, mouse and two HDMI displays across four computers. It suits secure or multi-domain workstations where peripheral isolation matters.

4K30 UHD Resolution Support

The switch drives dual displays up to 3840x2160 at 30Hz for clear UHD visuals across both screens. Extended or duplicated display modes give flexibility for different workflow layouts. KM mode allows keyboard and mouse control across computers that each drive up to four displays.

USB 3.0 Port Assignment Feature

A unique function lets you assign a USB 3.0 port to stay mapped to a specific computer while the KVM switches all other peripherals. This keeps smart card readers or storage keys bound to their host system. Freeze Audio maintains a dedicated audio path independent of video switching. || Buyers needing more than four computer ports or higher refresh rates at 4K will need a different solution. The unit does not support single-head operation or DisplayPort inputs.

How it compares

Measured against everything we stock in KVM Switches & Rack Consoles, at today’s prices. Recalculated every night.

Price $757.99
Pricier than about 91% of the 4,010 comparable items (median $105.49).

Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the DK42HU-N to four computers and two monitors without losing the USB 3.0 assignment?

Connect each computer's dual HDMI outputs and USB cables to the four ports, attach two monitors to the console HDMI outputs, then use the front panel or hotkeys to assign the USB 3.0 port to stay mapped to one computer while the keyboard, mouse, and other USB devices switch normally.

What maintenance will the DK42HU-N need after extended use?

No scheduled maintenance is required; keep ventilation slots clear of dust, verify HDMI and USB cables remain firmly seated, and check for firmware updates from the manufacturer if switching behaviour changes.

At what resolution and refresh rate does the DK42HU-N hit its video bandwidth limit?

The switch supports up to 3840x2160 at 30Hz per display; pushing higher refresh rates or resolutions beyond 4K30 will exceed the HDMI bandwidth and cause signal loss.

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