PowerS 12 Port USB Hub with 2 Control Switches 12 USB 2.0 ports - connect USB devices such as external hard drives, mp3 players, mice, digital cameras, printers, etc. Transfer or backup your mp3's, digital photos, and digital videos to your desktop or laptop with rates up to 480Mbps Windows 98SE /ME /2000 /XP /Compatible with Vista /7, Mac OS 9.1 or above, Linux 2.4 or above Plug-n-Play, Hot swappable, Hot pluggable, Chains up to 127 USB devices.