Description:The USB flash drive is made of strong metal and is therefore extremly robust and durable.Operating system: compatible with most major operating system (Windows 2000/XP/VISTA,Window 7/8,etc.).Keyring design: easily attach to keychain, briefcase, purse, backpack,etc. ultra-small, mini-shape, easy to carry.Plug and play, no external power supply required, perfect for keeping all of your documents, videos, music and photos handy.Using USB 2.0 interface and compatible with USB 1.1, high read and write speed, low power consumption,save the data security long.Specification:Material: metal.Size: 47*12*4mm.Color: gray.Interface: USB2.0.Capacity: 1GB/2GB/4GB/8GB/16GB/32GB/64GB/128GB.About capacity display in computer:1GB = approximately 850-950 MB.2GB = approximately 1.7-1.9 GB.4GB = approximately 3.2GB-3.8GB.8GB = approximately 6.9GB-7.3GB.16GB = approximately 14GB-15GB.32GB = approximately 28GB-31GB.64GB = approximately 58GB-63GB.128GB = approximately 115GB-126GB.NoteThere might be a bit color distortions due to different computer resolutions.There might be a slight errors due to different hand measurement.There are some differences between the display capacity and standard capacity memory products.Package included: 1 * USB Flash Drive.