Fun USB memory just look at it! External Material: Made of silicone rubber that feels good in the touch, it is strong and hard to break, and can be used for a longer time than normal USB memories. Super cute USB memory, also a great gift for your friends and family. Large capacity of 8 GB to store images and music. Storage Capacity: 8GB Interface: USB 2.0 Environment Temperature: -40c~+70c Storage Temperature: -50c~+80c Usb Service Voltage: 5.5V at 4.5V Shelf Life: 10+ Years Operating System: win98/me/2000/xp/vista/win7/win8, mac os 9.xlin/lin/xlin/ux2.4 USB Connection: Hot Plug & Play