1.USB 4-port hub:1.1/2.0 version                                 
2.Full plug-and-play capbility                                            
3. Hot-swapping capability                                          
4.The end of the three USB interfaces are freely rotate 300-degree angle,easily connecting to various USB equipment.                                                           
5.DC power:5V 500mA (DC adapter not included) and over-current protection function                         
6.Compatibility:Windows98 SE or above and Mac OS 8.6 or above