1) Expand four usb port, supply up to 550mA current per port
2) Adopt the second age usb controller
3) No external power supply
4) Driveless, hot plug& play
5) Internal over current protection circuits
6) Support USB 1.1, comptible with USB 2.0, full speed up to 12mbps
7) Support: Win95 osr2/98se/me/2000/xp, linux2.4 and mac os8.5 or over version
8) Chain up to 127 USB drives

OEM/ODM,Customized Logos/Designs are Welcome