Product Description material: Zinc Alloy Size: 48*12.3*4.6mm Color: silver gray, gun color Memory capacity: 64GB; 128GB Quantity: 1 piece Package Contents: 1*U Disk 1.Wide CompabilityMemory stick compatible with most systems such as Windows 7 / 8 / 8.1 / 10 / Vista / XP and Mac OS. Moreover usb drive can work for PC, Laptop, Computer etc. 2.Large Capacity StorageUsb drive has large capacity so that it has enough storage room to meet all your needs of daily use on work, school, home, and traveling for photos, music, videos, movies, data backup and file transfer. 3.High Speed TransferUSB 2.0 flash drive`s transfer speed fast, transfer and back up files only need few minutes, save more time, make everything more convenient. 4.Lightweight and Portable The low weight of usb stick, which is smaller than a man's thumb. It`s with keychain so that you can carry it anywhere, dont worry about forgetting to carry it or losing it. 5.Waterproof and Durable USB flash drive made of premium metal material, it`s waterproof and shockproof.