Hama bus powered usb 20 hub 14 for connecting up to 4 usb devices eg mouse keyboard printer scanner to one usb port usb 20 downward compatible with usb 11 data transfer rates of up to 480 mbits bus powered ie voltage supply via usb buscomputer bus overvoltage protection for pc in case of short circuit of the peripherals included integrated high quality usb connecting cable system requirements windows 2000xpvista78 und mac os 9x dimensions 330mm x 300mm x 10mm