Tripp Lite USB Display Adapter, 4 in, BlackThis adapter allows you to add an additional DVI or VGA monitor or multimedia projector to your computer. Hot-pluggable device. Use up to six adapters simultaneously, adding up to six additional monitors to a single computer. USB bus-power eliminates need for an AC adapter for external power. Cable Type: Display Adapter; Connector/Port/Interface: USB 2.0; For Device Type: VGA/DVI Monitors; Projectors; Connects Devices (From/To): Monitor to PC.