... Extensively compatible with scanner, digital camera, digital vidicon, optical mouse, Keyboard, USB flash disk,etc.5. Supports up to 127 ... Supply ,No external power supply required10. Single chip integrated USB HUB controller with embedded proprietary processor11. Easy for use ... or at home. * Perfect for connecting USB 1.1or 2.0 perpherals such as USB mouse, scanner, digital camera, digital vidicon, ...