Usbkingdom 16GB USB 2.0 Flash Drive Waterproof Metal Key Keychain Design Pendrive Memory Stick Thumb Drive Vintage copper metal key USB flash drive with keychain,51*16*5mm,15g,real capacity,good choice for using or as gifts for friends Key design,easily attach to keychain, briefcase, purse, backpack,etc.,make it available all the time High speed USB 2.0 interface and compatible with USB 1.1;Use A-class chip, can be erased repeatedly for 100,0000 times Plug and play;Easy to read and write in high speed;Low power consumption, durable solid-state storage Operating System: Windows XP/7/8/98/ME/2000/Vista,Mac OS/Linux2.4 and more