IOGEAR 3-Port USB 2.0 Mobile Hub GUH276 (Black) 2-in-1 Hub + Mini-B USB connector design Tuck-away cable management for convenient storage Lightweight and no power supply required( Total device power consumption cannot be greater than 350 mA.) Easy connection to cell phone or other USB devices with Mini-B connector Requirements, Windows 2000, XP, Vista, Mac OS X v10.3.9 or later