1.USB 4-port hub: 1.1/2.0 version                                                 
2 USB hub powered and  no external adapter is required                                 
3.Plug-and-play.Driver is not required                                
4.Support Windows98/2000/XP/Windows7/Vista         
5.Wide used for external storage devices,Scanners,Printers,DVD Drives,CD-RM drives,Digital Cameras/Camcorder                                                      
  6.DC power supply  5V  (DC adapter not included)