tripp lite s u244-001-vga-r, usb to vga display adapter, enables you to connect an additional monitor or projector to a computer/laptop usb 2.0 port. up to six u244-001-vga-r adapters can be used simultaneously, allowing the user to connect up to six additional monitors to a single computer. once the installation is done, the computer screen appears on the add-on monitor(s) without the hassle of function keys to swap to a second monitor. the u244-001-vga-r chip-set supports video resolutions up to 1920 x 1080 (60hz), 1080p (60hz). the u244-001-vga-r is compatible with windows 2000 and later, and mac os x 10.4 and later operating systems. 1 year limited warranty. key features add an additional vga monitor through a single usb 2.0 port hot pluggable add or remove a monitor without the need for a system reboot use up to six adapters simultaneously, adding up to six additional monitors to a single computer view large spreadsheets across multiple screens by extending video amongst all monitors play video on one monitor while working on another do multiple screen presentations from a laptop computer bus powered...no external power adapter needed supports video resolutions up to 1920 x 1080 (60hz), 1080p (60hz) compatible with windows 2000 and later, and mac os x 10.4 and later system requirements 1.usb 2.0 port 2.computer running windows 2000 or later, or an intel-based mac running os x 10.4 or later. power pc-based macs are not supported. 3.vga monitor