Belkin's Advanced Secure DVI-I KVM Switch offers superior security & data protection for government agencies by providing true data path isolation between systems & networks. It is fully compatible with legacy & new government systems & exceeds NIAP security requirements. Using uni-directional data paths with optical diodes, it prevents peripherals from being used to leak information from one computer system to another. Additional security is provided through its end-to-end tamper-proof system that prevents physical tampering, & its intuitive user interface reduces user-switching errors by providing clear identification. Model F1DN104E supports two monitors & up to four computers.