Specification : 1) 7 USB 2.0 high speed ports 2) New shape design 3) Fully compliant with USB 2.0 specification 4) Supports up to 127 hi-speed devices 5) Supports data transfer rate at 1.5/ 12/ 480Mbps 6) Individual port over-current protection 7) Friendly and ergonomic design, portable, for travel 8) Provide up to 500mA per port sufficient for diverse devices 9) Plug-and-Play installation 10) Supports Windows 98/ 98SE/ 2000/ ME/ XP/ Mac OS 8.6 and so on 11) Hi-speed downstream ports with USB 12) Hi-speed upstream port with A/ M 13) Port AC-DC adaptor avaliable ( power adaptor not included) http: / / www.tgybuy.com/ computer-accessories