1. Interface type: High speed USB3.0,USB 3.0 Flash Drive write speed 8.9M/S---18.9M/S, it can be plug to your android cellphone and PC/Laptop 2. Capacity:512GB/256GB/128GB/64GB/32GB. 3. Material: Metal 4. Color: Black,, Gold, Orange,red,green.purple,blue. 5. Customized logo: support (extra cost) 6. Plug & Play: support 7. Hardware Requirement: PC with USB connection,Notebook,MAC 8. Operating system: compatible with most major operating system (Windows 2000/XP/VISTA,Window 7/8,Mac , etc.) 9. Endurance: more than 1 million times Package include: 1pc USB Flash Drive(with box package) Why the USB flash drive real capacity is not correct capacity? Flash memory vendors are using decimal arithmetic:1MB = 1000KB,1G = 1000MB calculated, the operating system using binary arithmetic:1MB = 1024KB,1GB = 1024MB; so there are some differences between display capacity and nominal capacity of flash memory product example. 4G is about 3.4G;