Message In A Bottle Cork Stopper 4GB High Speeed USB 2.0 Flashdrive Here is a new way to send personal messages combining old-tech and high-tech. Interface: USB 2.0 (compatible with USB 1.1) Supporting OS: Windows 98/XP/Vista/7 and newer, Mac OS X or later, and Linux Kernel 2.4 or later. Type: Plug and play device (Just plug it into a USB port and wait for it to be detected by the PC). Size: D1.2 x 2.4". Material: Glass, Cork