Aten CS-1644 - 4-Port USB 2.0 DVI Dual View KVMP Switch The CS1644 USB 2.0 DVI Dual View KVMP Switch charts a revolutionary new direction in KVM (Keyboard, Video, Mouse) switch functionality by combining a 4-port KVM switch with a 2-port USB 2.0 hub at the same time as providing dual-screen support for two DVI displays , making it ideal for graphic designers, banking and finance consultants, medical applications, and gamers. Moreover it carries advanced features, such as nVidia 3D Vision ready 120Hz 3D display support, gaming keyboard compatibility and port selection/switching using a mouse, aimed at giving you flexibility, convenience and enjoyment. As a KVM switch, it allows users to access four computers with dual-screen support from a single USB keyboard, USB mouse, and dual-screen console. As a USB hub, it permits each computer to access any peripherals connected to the hub on a 'one computer at a time' basis.