Available Capacities : 2GB, 4GB, 8GB, 16GB, 32GB,64GB,128GB flash memory USB Chip: Real Capacity of Original A- Glass flash chip Support USB 2.0 and 3.0 specifications Operation Systems : Windows Vista/XP/2000/ME/98/95/7, Mac OS 8.6 and above, Linux 2.4.X Compatibility : PC or Notebook with a USB interface Drivers: Required only for Windows 98/95. Online Download Available Transfer Rate: USB 2.0 port: 6Mbps of writing speed, 14Mbps of reading speed USB 3.0 port: 40Mbps of writing speed, 120Mbps of reading speed No external power source required Additional functions: password and bootable High speed, at least 10 years of data retention Logo Printing: Laser engraved,Color printing Package: Free poly bag.(Customized package is available)