Description Note : this item does not work for iphone. thank you ! 1. USB connection,support Hot plug & Play. 2. No external power supply . 3. Support different types of os. 4. Solid State Storage, Shock proof and electromagnetic proof. 5. Write protection switch 6. Durable data storage 7. Fast speed in write/read transfer 8. Hardware Requirement: PC with USB connection,Notebook 9. Life:>1 million times 10.Capacity:128MB 8GB/16GB/32GB/64GB./128GB Working Temperature: 0 ~ 60 C Material: Metal Color: blue, red, green, black, white, purple Weight: 13g Compatible : Windows 2000 / XP / Vista / win 7, Mac 9.0 or above No need external drive/power supply only plug in. Case made by steel which protect your data inside.