Safely and securely switches between 4 isolated computers with different security levels Certified to NIAP/Common Criteria Protection Profile for Peripheral Sharing Switches V3.0 Common Access Card (CAC) port supports biometric and other smart card readers KVM switch supports UHD resolutions up to 3840 x 2160 (@ 30 Hz) for crystal-clear 4K x 2K video Dual-monitor support enables multitasking and generates increased productivity; NIAP approved