Metal Crystal Jewelry Heart Shape Necklace Green 8gb USB 2.0 Flash Drive Convenient - small, capless and pocket-sized for easy transportability Durable - metal casing with sturdy ring 0.5*0.1*2.5in(L*W*H) Supports WINS 7/8/98 / SE /ME / 2000 / XP, Vista and Mac Hot plug & Play;No external power supply requird