This is a very different pen drive than the usual ones, the one big difference is that it has two male connectors on either side, as against only one in almost all the other pen drive designs. It spins easily because of the middle black circular portion. Each male connector can have a capacity ranging from 1gb to 32gb. The USB interface is 2.0. Great that you get to carry around double storage in a single pen drive, making it useful for the big businessmen. The two sides are good areas to print custom designs on them.