4 port USB HUB & Warmer Truly plug & play automatic installation 4 port USB HUB & Warmer 4 USB 1.1 ports a type female connectors Downstream 1 USB b type male connector upstream with a cable Support both full-speed 12Mb/sec and low-speed 1.5Mb/sec transfer rates Chains up to 127 USB devices Individual port over-current protection Provide up to 500 mA per port sufficient for diverse devices Truly ...