Specifications & Features: •4xUSB port,up to 500 ma per port •Over current detection and protection on each port •Easy Plug-and-Play connection •Coming with a dust cap for USB A/M connector and a dust cover for each USB A/F connector •Support both Full-speed(12Mbps) and Low-speed(1.5Mbps) •Support Windows98/2000/XP or higher •Support Mac os V8.5 or higher