The PS/2 USB KVM Switch CS84U is a desktop installation device that enables you to control four computers from a single KVM console (PS/2 or USB keyboard and mouse, as well as a VGA monitor). In addition, the CS84U supports ATEN's new Video DynaSyncT technology, which prevents display problems when devices are switched on and optimises resolution. One PS/2 or USB console controls four computers with VGA interface Dual interface - supports computers with PS/2 or USB keyboard and mouse Computer selection via front panel port selection keys, hotkeys and mouse Multi-platform compatible: Windows, Linux, Mac and Sun Improved graphics quality - resolutions of up to 2048 x 1536, DC2B Video DynaSyncT - exclusive technology from ATEN to prevent display problems when restarting and optimise resolution when switching ports Console with mouse port emulation and bypass function supports most mouse drivers and multi-function mice Keyboard emulation for Booting: https://elecena.pl/product/18363826/cs84u-at-kvm-switch-vga-ps-2-usb-4-ports 2021-05-06 https://elecena.pl/product/18363826/cs84u-at-kvm-switch-vga-ps-2-usb-4-ports 2021-10-30