Monster Digital Coppa 4GB USB 2.0 Flash Drive [32MB/s read, 28MB/s write, Twist Cap] USB 2.0; a lot less time wasted waiting on data transfer. Speed; up to 32MB/s read and 28MB/s write Integrated Twist Cover; no cap to lose Static and Dynamic Wear Leveling; adds to the Life of the drive FAT File System; makes the drive compatible with PC and Mac systems