1. pen USB flash disk, G/W 0.2KG, N/W 0.15KG 2. retail packing: plastic / metal case / paper box 3.interface: 2.0 with reading speed: 900Kbps and writing speed: 700Kbps (computer configuration dependent) 4. Anti-vibration and heat dispersible 5. Plug and play-no software required 6. No external power supply required 7. OS support: Win98/ME/2000/XP and MAC OS 9.1 or later 8.optional accessories: user manual, CD driver for win95 and lower, USB cable