Features: 1) USB 1.1/2.0 compliant, hot plug and play 2) No external power is required, powered by USB bus directly 3) Compatible between different operating systems 4) Electronic storage device, no mechanical components, shake protection, electromagnetic wave protection 5) Write/delete protection switch 6) PC compatible, Mac compatible with USB port 7) Optional capacity: 128 MB - 4GB Note:The picture and functions are only for reference and the actual products are subject to our order confirmation