size: 71.1x19.4x7.5 mm housing: plastic color: silver, blue, white, black, yellow - Compact and lightweight solution of mobile storage - Capacity:128M,256M,512M,1G,2G, 4G. - USB interface: USB 1.1/2.0 - Fast data transfer rate(theoretical): - USB 1.1: 1.1MB/s for Read, 1.0MB/s for Write; - USB2.0: 30MB/s for Read, 25MB/s for Write.