Black Box Secure NIAP 3.0 KVM Switch - Dual-Head, HDMI, CAC, 4K, 4-PortBlack Box Secure NIAP 3. 0 KVM Switch Dual Head, HDMI, CAC, 4K, 4 Port Experience uncompromising control and rock solid security with the Black Box Secure NIAP 3. 0 KVM Switch. Designed for high stakes environments where sensitive data must be safeguarded, this 4 Port, dual head KVM switch lets a single operator manage up to four HDMI computers from a single workstation. With two HDMI monitor outputs and seamless keyboard mouse sharing, you gain