This 4 Port Dual Link DVI USB KVM Switch provides simple, yet comprehensive control of up to four directly connected computers as well as audio switching capability and support for high resolution applications (supports 1080p, and up to 2560x1600 @ 60Hz, up to 3840 x 2400 at lower refresh rates, and Apple Cinema quality resolutions) - a superior switching solution that integrates perfectly into multimedia environments. The DVI USB KVM Switch is compatible with all USB supported operating systems, and features a built-in USB 2.0 hub that allows you to share up to three high speed USB devices between computers.