StarTech CK4-HP204C 4-Port Dual-Monitor Secure KVM Switch

Overview

The StarTech CK4-HP204C is a NIAP Protection Profile 4.0-certified, 4-port dual-monitor KVM switch built for classified and high-security environments where mixing video signals from different classification levels is simply not an option. It supports two simultaneous displays per host — one via DisplayPort and one via HDMI — letting operators manage up to four computers from a single keyboard, mouse, and dual-monitor console without any hardware-level data bleed between ports. If your deployment operates under federal, DoD, or intelligence community security mandates, NIAP PP 4.0 is the certification level that matters.

Key Features

• NIAP Protection Profile 4.0 Certification: This is the critical differentiator. NIAP PP 4.0 goes substantially further than basic KVM switching — it enforces hardware-enforced isolation between computer ports, preventing data leakage across classification boundaries. Without this rating, a KVM is not suitable for classified or sensitive compartmented information (SCI) environments.
• 4-Port Dual-Monitor Output (DisplayPort + HDMI): Each of the four connected computers gets full dual-display support. The console side delivers 2x DisplayPort and 2x HDMI outputs simultaneously, so your operator sees both screens for whichever host is active. This eliminates the need for separate single-monitor KVM units multiplied across a workstation cluster.
• Flexible Host Video Input (DP + HDMI per port): The 8x DisplayPort Female and 8x HDMI host connectors (two per computer port) accommodate mixed workstation video card configurations. A host with two DisplayPort outputs and a host with two HDMI outputs can coexist on the same switch — useful when deploying across heterogeneous government workstation builds.
• Analog Stereo Audio Switching: Four 3.5mm stereo audio inputs on the host side switch in tandem with the active computer port. The console outputs a single 3.5mm stereo female jack — clean audio follows the active host without manual reconnection.
• 8x USB 2.0 Type-B Host Ports: Two USB 2.0 Type-B connections per host port carry keyboard and mouse HID data. The console side provides 3x USB 2.0 Type-A ports for your peripherals. USB data paths are hardware-isolated between ports per NIAP PP 4.0 requirements — no pass-through risk.
• Metal Chassis, 12V/3A Power Supply: The all-metal enclosure handles the thermal demands of continuous multi-monitor switching in rack or desktop deployments. The 12V DC / 3A power requirement (36W) means you need an appropriate external supply — plan for dedicated outlet or UPS-protected power in your installation design.
• Up to 6m (19.7 ft) Cable Runs: Supported maximum cable length of 6 meters gives adequate slack for under-desk or rack-adjacent workstation setups without signal degradation across the supported video interfaces.
• 3-Year Manufacturer Warranty: The CK4-HP204C carries a 3-year warranty, appropriate for a fixed-installation secure KVM deployed in government or enterprise environments where replacement logistics matter.

Integration and Compatibility

The CK4-HP204C (often searched as CK4 HP204C) connects to any workstation presenting DisplayPort or HDMI video outputs alongside USB HID. The console interface accepts standard USB keyboards and mice — no proprietary peripherals required. Operating temperature range of 0°C to 40°C (32°F to 104°F) suits standard climate-controlled server rooms and secure operations centers. Storage temperature tolerance extends to -20°C to 60°C, relevant for units held in spare inventory or shipped to field sites before installation.

Frequently Asked Questions

Q: What NIAP certification level does the CK4-HP204C carry?

A: The CK4-HP204C is certified to NIAP Protection Profile 4.0, the current standard for secure KVM switches used in classified and government environments requiring hardware-enforced port isolation.

Q: How many monitors can each connected computer use?

A: Each of the four host computers supports two simultaneous displays — one DisplayPort and one HDMI output per host. The console side provides 2x DisplayPort and 2x HDMI outputs for the operator.

Q: What is the maximum cable length supported?

A: The CK4-HP204C supports cable runs up to 19.7 feet (6 meters) on its host connections.

Q: Does the CK4-HP204C include audio switching?

A: Yes. It switches analog stereo audio (2-channel) in sync with the active computer port, with four 3.5mm stereo inputs on the host side and one 3.5mm stereo output on the console side.

Q: What is the warranty on the CK4-HP204C?

A: StarTech provides a 3-year manufacturer warranty on the CK4-HP204C.

Q: What power supply does the CK4-HP204C require?

A: It requires a 12V DC / 3A external power supply (36W). A dedicated outlet or UPS-backed circuit is recommended for continuous secure operations center use.

Ted Perry

The spec I keep coming back to on the CK4-HP204C is the NIAP PP 4.0 certification — not because it's a checkbox, but because it represents a specific hardware architecture. Port isolation on a NIAP 4.0 device is enforced at the silicon level, not in firmware. That distinction is the entire reason this unit exists versus a commodity KVM costing a fraction of the price.

Technical Highlights:

• NIAP PP 4.0: Hardware-enforced isolation between all four computer ports — this is the compliance gate for classified, SCI, and DoD workstation environments. A non-NIAP KVM will not pass an ATO review for those use cases.
• Dual-Monitor per Port (DP + HDMI): Both video outputs switch simultaneously, so operators get full dual-screen continuity when switching hosts. No secondary monitor lag or manual input reassignment needed.
• 8x USB 2.0 Type-B Host Ports: Two USB paths per host carry isolated HID data. The 3x Type-A console ports handle keyboard, mouse, and one additional peripheral — sufficient for most analyst workstation setups without a separate USB hub.

Deployment Considerations:

• The 12V DC / 3A power draw means you need a dedicated supply — factor that into your rack power planning or UPS capacity. The unit does not bus-power from the host USB ports.
• Maximum cable run of 6 meters (19.7 ft) is adequate for most co-located rack/workstation setups, but if your hosts are more than 6 meters from the console position, you will need to redesign the physical layout — there is no signal extender option within the NIAP PP 4.0 certification boundary.

The CK4-HP204C is the right fit for a four-seat secure operations center where operators are switching between systems of differing classification levels and the ATO specifically calls out NIAP PP 4.0 compliance. It is not the right fit for a standard IT helpdesk KVM situation where cost-per-port is the primary driver.