Retractable USB memory stick, sized in 40 x 19 x 5.9 mm only F2011)Retractable USB memory stick2)1GB, 2GB, 4GB, 8GB, 16GB3)USB 2.0, compatible with USB 1.1 4)Nand Flash, COB Technology5)Support Win98/98SE/ME/2000/XP/Vista/MAC OS/LINUX automatic 6)Data retention: more than 10 years 7)Unit size: 40 x 19 x 5.9 mm8)Available colors: Black, White