Black Box ServSwitch Secure KVM Switch with USB, EAL4+ Certified, DVI, 4-PortIn environments where security and reliability matter most, the Black Box ServSwitch Secure KVM Switch with USB, DVI, and 4 ports delivers trusted, hardware based control of up to four computers from a single station. Built to meet rigorous security standards, this KVM switch provides robust data isolation, preventing cross contamination between connected systems while delivering crisp, digital video and seamless peripheral sharing. Its EAL4+