1) Adds 4 USB 2.0 hi-speed ports with Time Indicator  
2) Fully compliant with USB 2.0 specification  
3) Backwards compatible with USB 1.1  
4) Supports data transfer rate at 1.5/12/480 mdps 

5) Individual port over-current protection 
6) Friendly and ergonomic design, easily potable  
7) Provides up to 500mA per port, sufficient for diverse devices 
8) Power adapter included (5V/2.6A output) 
9) Plug and play installation 
10) Supports Windows ME, Windows XP /2000/Vista
11) Supports Mac OS 8.6 or above 
12) Hi-speed downstream ports with USB A female connectors 
13) 1 hi-speed upstream port with mini USB 5p jack    

System requirements:  

1) Pentium based PC or power PC based Macintosh with available USB 2. 0 port 
2) Mac/Windows OS with USB 2. 0 support

More items or questions pls contact me 

SKYPE: FIRSTCLASS0001