1) Windows XP Professional/Home Edition 2) Windows 2000 Professional/Windows Me/Windows 98SE 3) Windows 98 Specifications: 1) USB version 1.1 and 2.0 compliant 2) Maximum reading speed is 12Mbps with a USB 2.0 port 3) Maximum writing speed is 7.0Mbps with a USB 2.0 port 4) Capacity:128MB,256MB,512MB,1GB,2GB,4GB,8GB Package includes: 1) USB 2.0 mini drive 2) Neck strap 3) Software CD 4) User guide and warranty information