A standard interface supported since Windows 98. Hardware components are automatically recognised and configured when connected to the PC and are ready for use immediately. This port has been used on projectors for some time, but until 2006 it could only be used to connect a mouse.
Today, modern projectors can also display Office files, PDFs or multimedia formats directly via USB without PC support. As this is not yet a standard feature, you'll find the relevant information in the product's technical data or the manufacturer's data sheet. Manufacturers that have integrated this function into some models include Epson and BenQ.
