Capacity optional: 64mb/128mb/256mb/512mb/1gb/2gb; Compliant with USB 1.1 & USB 2.0; Portable data storage device; 2-in-1(ball pen and USB flash disk); Color electroplating; NAND Flash memory chip embedded; System requirements:Win98/ME/2000/XP,Mac OS 9.0 x/X,Linux2.4x and above (Only Windows 98/SE needs the driver) Hot plug and play; Password protection; USB 1.1 Writting/Reading speed: 750KBps/1000kbps; USB 2.0 Writting/Reading speed: 6-8mbps/10-12mbps Standard accessory: External USB cable; CD Rom (driver);user manual (English) Necklace lanyard. Packing: Each in a gift box/Neutral in ENGLISH 100 pcs/carton; Carton size: 49 *36 * 25cm G.W.:12~13KG/CTN