The usb 20 4 port hub makes it simple to connect up to 4 usb devices at the same time to a pc or mac plug in your favorite usb devices and profit from the very fast connection hi speed usb 20 certified for fast data transfer usb 11 compatible supports usb high speed 480mbps full speed 12mbps and low speed 15mbps data transfer modes no external power supply needed ideal as a present or giveaway cable length 30cm supports windows 7 8 vista xp and mac os 10x