Super Slim 4 Port USB Full-Speed Hub No Adapter needed USB2.0 Full Speed up to 12 MB/sec Easy plug and play installation 4 Ports with automatic recognition function, compatible with all operation system Connect with up to 127 USB interfaces simultaneously Overpower protection for every port Graceful and ergonomic designed, portable Offers till 500mA through sufficient for diverse apparatus Power Adapter: 5V /2.6A Output Suitable for Windows 98, Windows2000, Windows ME, Windows XP, Mac OS 8.6 Package included: 1 x 4 port USB hub