USBDrive 512MB Removable Storage Media Neck strap, key chain and USB extension cable included FREE with purchase. USB 1.1 Standard Compatibility with USB 2.0 Compliance. Compatible with Windows *98SE, Me, 2000, XP, Mac OS 8.6 ~ 10X and Linux 2.4.24. USBDrive sizes 32MB / 64MB / 128MB / 256MB / 512MB / 1GB / 2GB