Info: Capacity: 128MB, 256MB, 512MB, 1GB ,2GB Hardware: IBM compatible Desktop, Notebook or MAC computer with USB port OS: Windows 98, Windows ME, Windows 2000, Windows XP, Mac OS 9.x /x, linux2.4.x or above Power Supply: USB bus-powered (4.5V-5.5V) USB Host Interface: USB 2.0 Specifications , compatible with USB 1.1/1.0 Write Protection: Yes, by write-protection switch Dimension: 67.5mm(L) x 18.6mm(W) x 8.5mm(H) Weight: 10g (approx)