Quantum QHM6633 4-Port USB Hub (White) 4 USB ports Standard A type up to 100mA current per port, 1 USB Mini B type female input connector, The QHMPL hub provides full over current protection, QHMPL USB HUB supports the following signalling rates, A low-speed rate of 1.5 Mbit/s (183 kB/s) as is defined by USB 1.0, The full-speed rate of 12 Mbit/s (1.43 MB/s) the basic USB data rate defined by USB 1.1, A high-speed (USB 2.0) rate of 480 Mbit/s (57 MB/s), QHMPL Hub is capable of chaining up to 127 USB devices, Truly Plug and play automatic with ALL OS including windows 98,2000, ME , XP ,7, Mac Linux virtually all OS, USB 2.0 and ACPI compliant.