1.USB 1.1/2.0 compliant , Hot plug &play; 2.No external power is required; 3.High capacities; 1)USB flash disk, very fashionable 2)Suitable for large capacity computer or small size laptop 3)High speed, at least 10 years of data retention 4)Compliant with USB specification 1. 1/2. 0 5)Plug and play, no external power supply required, USB bus-powered 6)Capacity: 64MB, 128MB, 256MB, 512MB, 1GB, 2GB ...