... four USB port supply up to 550mA current per port 2) No external power supply necessary USB HUB H2629, 4ports USB2.01) Expands four USB port supply ... supply necessary3) Driverless, hot plug and play 4) Internal over current protection circuits5) Support USB 1.0/1.1, USB2.0, with ... XP, Linux 2.4 and Mac or over7) Chains up to 127 drives8) Different colors available, thin body USB HUB ( 4 ports ) H2629( ...