1)Available capacities: 64MB, 128MB, 256MB, 512MB, 1GB. 2)Hi-speed USB 2.0 certified . 3) Compatible with USB 2.0. 4) For Mac and PC, no driver required . 5) No external power required . 6) Functions as hard drive . 7) LED indicates power, read/write . 8) Automatic system detection as removable disk . 9) Shock resistance: 1,000g . 10) Min. data retention: 10 years. 11) 3 years warranty . 12) Fashionable design . 13) Pretty look, silver plastic casing, reasonably small size and smooth feeling. 14) Can be used with Macs and PCs and requires no external power.