4GB Knife Shaped USB Flash Drive Blue Drive Capacity: 4GB....USB Interface: USB 2.0 Reading Speed: 12MB/sec....Writing Speed: 8MB/sec Operating Systems: Windows 98 / ME / 2000 / XP / Vista / MAC / Linux 2.4X Cool design and easy to use, just plug and play  Extremely fast transfer Put it on your desk, book, TV, or pencil box, a mini and super decoration