Specifications & Features: •Compatible with USB Specification Rev 2.0 •Data Transfer rate can be 1.5/12/480 Mbps •Four downstream ports can handle high speed (480Mbps),full-speed (12Mbps) and Low-speed (1.5Mbps) •Support up to 127 devices •Support WIN98/2000/XP/Mas os V8.5 or higher