Multifunction Folding Knife 8GB USB Flash Drive with Ballpoint Pen (Red) + Worldwide free shiping Hardware Requirements: UIBM compatible desktop and notebook PC or Mac with USB port Operating System: Windows 98/ME/2000/XP/vista/Windows 7,Mac OS 9.2&higher/Linux 2.4 No physical drive required, no external power supply required, Plug-in and play, over ten years data retention Interface: USB 2.0 Backward compatible USB 1.1 Data Transfer Speed: Reading 12MB/s,Writing 6MB/s