Dial USB flash drive, scroll button, retractable connector. Features:1)Dial USB drive, scroll button, retractable connector 2)1GB, 2GB, 4GB, 8GB, 16GB ... 3)USB 2.0, compatible with USB 1.1 4)Nand Flash ... , COB Technology5)Support Win98/98SE/ME/2000/XP/Vista/Win 7, Mac OS 9.x/10.0.x/10 ...