The Kramer DK42D - 3 HighSecLabs Secure Dual Head 4 - Port 4K30 UHD DVI - I KVM Switch allows users to connect up to four computers to one local user, providing seamless switching between sources without performance degradation. With a resolution of 3840 x 2160 at 50 Hz and 60 Hz, this KVM switch ensures high - quality video output. It features multiple connectivity options including 1 x Network (RJ - 45), 2 x PS/2 ports, 6 x USB ports, and 10 x DVI ports, making it versatile for various setups. The device is designed for desktop use, allowing for easy installation on any surface. Additionally, it is NIAP Common Criteria Protection Profile version 3.0 certified, ensuring the highest level of security by isolating connected computers and protecting against data leakage and malicious attacks through shared peripherals.