MECO 1Pcs 64/32/16/8/4GB Aluminium Alloy USB 3.0 Flash Drive Memory Stick Storage Thumb Stick Pen Only 1Pcs!!!!! Capacity: 4GB Writing & Reading Speed: 25-120 MB/S Compatible with USB 1.1/2.0 Support Windows 7 / 8,Windows Vista,Windows 2000,Mac OS X, Linux.