USB 2.0 Flash Disk 128MB, 256MB, 512MB Lexar USB2.0 Flash Disk 256MB, 512MB Features: 1) Storage capacity (32MB, 64MB, 128MB, 256MB, 512MB) 2) Standard USB2.0 complied wtih 1.0/1.1, plug and play 3) No external power needed 4) Protection switch for data security 5) Writing speed: 1.3 ~ 4.5m/s, reading speed: 5m/s 6) Data retention over 1m times and kept at least over 10years 7) Slim size, light weight 8) Only windows 98 installation drive needed 9) Dimensions: L71.2 x W9.0 x H7.8mm 10) Weight: 0.01kg