Capacity: 128MB/256MB/512MB/1GB/2GB/4GB USB 1.1 or 2.0 optional Original flash chip Shock-proof and moisture-proof Special stainless steel pen design High speed to read at 1.6MB/s, write at 1.2MB/s. Hot plug and play Operating system: Windows98/NT/ME/2000/XP or higher (driverless
above Win98) Unit size:140*15*15mm, weight:35g