Patriot 4 GB Razzo USB Drive with Ready Boost Ready Vista Certified - PSF4GRUSB Hi Speed USB 2.0 Compatible (backwards compatible to USB 1.1) Plug and Play Portable and lightweight (6.8 grams) Driverless in WIndows ME/2K/XP/Vista, Mac OS 9.x, OS X Linux with USB storage support Certified for Windows Vista