Adder AVSC1104 Ultra Secure KVM switch with USB, VGA and card reader 4 port EAL4+ & TEMPEST qualified design. Tempest certified design (USA NSTISSAM Level I and NATO SDIP-27 Level A), EAL4+ Common Criteria Evaluation Assurance Level 4 (augmented by ALC_FLR.2 and ATE_DPT.2). It features physical port identification where channel switching is controlled only from the front panel buttons. No keyboard or mouse switching commands are permitted. Data Sheet Manual