IOGEAR 4-Port Dual-Link DVI KVMP Pro Switch, GCS1204G Maximum Video Resolutions - DVI-D Dual Link: 2560 x 1600/DVI-D Single Link: 1920 x 1200 Audio Support for 2.0 or 2.1 Audio Supports High-End 3D Graphics Compatible with Gaming Keyboards and Support Mac Keyboard and Special Keys All Cables are Included Asynchronous Hotkey Switching between KVM Focus, USB Peripheral, and Audio Ports DynaSync supports EDID eliminates delay or change of video resolution when switching Firmware Upgradable Up to 4K UHD 3840 x 2160 @30Hz resolution when used with IOGEARs GHDDVIC4K3, 4K sources, and 4K monitors