1. Capacity: 256MB/512MB/1GB /2GB/4GB 2. USB 2.0 interface 3. Password setting 4. Shock-proof and moisture-proof, plastic shell 5. Write protection switch 6. High speed to read at 1.6MB/s, write at 1.2MB/s. 7. Hot plug and play 8. Operating system: Windows98/NT/ME/2000/XP or higher (driverless above Win98) 9. Unit size:77*26*11mm, weight:15g 10. Packing Detail: Inner packing size:13.3*13.3*3.3cm 11. Weight:0.13kg 12. Meas.:59*30*55cm, QTY./ctn.:136pc 13. Accessories: CD Disc ,Neck/Hand Strap ,Instruction Manual