1.USB 1.1/2.0 Interface, Full Speed, 480 Mb/sec 2.The slimmest compact Design 3.No external power required 4.Plug-and-play for PC or Macintosh 5.With 3 ports hub 6.Power LED indicator 7.Suit for All kinds of card 8.System: Windows 98Se/2000/me/xp/Macintosh 9.0 or above 9.Guarantee period : 1 year