Features: 
1) Overview: super-high speed of data transfer (reading: 6Mbps, writing: 2Mbps)
2) USB port supports hot plug and play
3) No physical drive required 
4) Small in dimension and light in weight 
5) Compact, light, and low power consumption under both active and suspend modes
6) Driverless for Win ME/XP/2000 and above 

7)128MB 512MB 1GB 2GB 4GB and so on is available