Visit Amazon site : br IOGEAR 4-Port Dual-Link DVI KVMP Pro Switch - Black (GCS1204G)br br Maximum Video Resolutions - DVI-D Dual Link 2560 x 1600DVI-D Single Link 1920 x 1200 br Audio Support for 20 or 21 Audio br Supports High-End 3D Graphics br Compatible with Gaming Keyboards and Support Mac Keyboard and Special Keys br All Cables are Included br Asynchronous Hotkey Switching between KVM Focus USB Peripheral and Audio Ports