Detailed : Common features: 1) USB 1.1/2.0 compliant, hot plug and play 2) No external power is required, powered by USB bus directly 3) High capacities 4) Highly compatibility between different operation systems 5) Electronic storage device, no mechanical components, shake protection, electromagnetic wave protection 6) Write/delete protection switch 7) More than 10 yearsí« data retention 8) High transferring rate (30 times than floppy driver) 9) Easily portable Special points 1) No battery required,ch arged by solar power 2) None Scratch Logo surface 3) Engrave mirrored metal back