Adder AVSD1004 Ultra Secure KVM switch with USB and DVI-I 4 port EAL4+ independantly tested against common criteria and  achieves Evaluation Assurance Level 4+. CERTIFICATION REPORT No. CRP259 . It features physical port identification where channel switching is controlled only from the front panel buttons. No keyboard or mouse switching commands are permitted. The AdderView Ultra secure EAL4+ certified USB, dual link DVI-I and audio KVM switch for use in environments where security must be assured. Ideal for Government, Military and other Secure data environments. Data Sheet Manual