... connect any USB device3.4 ports and power up to 500mA each port4.Extensively compatible with ... digital vidicon,optical mouse,Keyboard,USB flash disk,etc.5.Supports up to 127 USB devices6.Truly plug ... play and hot swapping capability7.Full data transfer rate up to 480Mbps8.Stopwatch, Timer,Clock, Date, 5 USB ... ' surface,good choice for gift promotion12.Support windows 98/me/2000/xp/vista,Mac OS9.1 or ...