68*20*9MM;1.1 OR 2.0; 64MB...1GB Features: 1. Easy Plug and Play 2. Data write/delete protect switch 3. No separate power or battery required 4. USB hot interface: USB 1.1/2.0 5. Driverless for Win 98/2000/XP/ME or above 6. Capacity(NAND flash memory): 64/128/256/512MB, 1GB 7. Shock resistent, anti-magnetic and longer data retention(10 years at least)