*Adds 4USB 2.0 Hi-speed ports; *Fully compliant with USB 2.0 specification; *support up to 127 Hispeed devices; *Backwards compatible with USB 1.1; *Support data transfer rate at 1.5/12/480 Mbps; *Individual Port Over-Current Protection; *Friendly &ergonomic design,easily potable; *Provide up to 500mA per port sufficient for diverse device; *Power Adapter included 5V/2.6A outup; *Plug&Play installation; *Support Windows 98,Windows2000,XP; *Support Mac OS 8.6 or above; *Hi-Speed downstream ports with Mini USB 5P Jack;