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,MAC 9. Life:>1 million times 10.Capacity:4GB/8GB/16GB/32GB/64GB Working Temperature: 0 ~ 60 C Compatible : Windows 2000 / XP / Vista / win 7, Mac 9.0 or above Read speed: 10~15MB / second Product Weight: 30g Written speed: 4MB / second No need external drive/power supply only plug in. Package Includes: 1 x USB disk