Combo All in One USB Memory Card Reader and 3 Port USB Hub Combo All in One Memory Card Reader + USB 2.0 Hub Five Memory Card slots and 3 USB 2.0 ports Plug-and-Play technology. Support for "hot swapping" of USB devices Fully compatible with USB 1.1 and USB 2.0 devices 1.5, 12 and 480Mbps data transfer rates