1. Available capacities:32MB,64MB,128MB,256MB,512MB,1GB,2GB,4GB,8GB,16GB,32GB 2. Compatible with USB 2.0 and 1.0 specifications 3. Reading Speed:8MB/S,Writing Speed:2MB/S 4. No external power source required 5. Supports Plug-and-play and hot-swap 6. Additional functions: password protection (optional) 7. With auto run and bootable function (optional) 8. Data retention: 10 years 9. With FCC (class-B), RoHS, WEEE, and CE certifications 10. Operating systems:Microsoft Windows 2000, XP, Linux 2.4.x or Mac OS 9.1, Vista. Material: plastic+metal Available Colours: silver/gold Dimensions: 60*22*5mm Imprint Size: 20*12mm Imprint Area: Front/Back.