SODIAL(R) USB stick Metal Cufflink 4G GB Flash Drive Usb 2.0 Cufflink Flash Disk memory Interface: USB 2.0 Size: 20.1x14.7x19.4mm Fast data transfer rates - read: 15 MB / s and write: 6 MB / s. Compatible with USB 1.1 / 2.0 Compatible PC, laptop, MAC Support Windows 7/8, Windows Vista, Windows 2000, Mac OS X, Linux.