1. USB 4-Ports Hub 1.1/2.0 version 2. USB hub powered and no external adapter is required. 3. Plug-and-Play, Driver is not required. 4. Support Window 98/2000/XP/Window 7 5. Wide used for external storage devices, Scanners, Printers, DVD Drives. CD-RM Drives, Digital Cameras/Camcorder