USB1.0, reading speed 900KB/S, storing speed 700KB USB2.0:Reading speed 7MB/S, storing speed 4MB/S Capacity:32MB, 64MB, 128MB, 512MB, 1G, 2G choices. Operating system:Windows98/NT/ME/2000/XP or higher (driverless above Win98) Accessories:Installation CD, User Manual Remarks:Wrist band style, environment-friendly silicon material, fancy colors of White/black/Purple/Green/Blue/Purple choices. Trademark: Eintrasse Model: U-B1 Standard: FCC/CE