Kootion 10 Pack 4 GB USB Flash Drive 4gb Flah Drives Keychain Thumb Drive Swivel Memory Stick Black 10 pack of 4GB USB Flash Drive with great cost performance and high quality, multiple color choices Plug and work, support windows 7 / 8 / 10 / Vista / XP / 2000 / ME / NT Linux and Mac OS, Compatible with USB2.0 and below Good performance in digital data storing, transferring and sharing with families, friends, workmates, clients and machines. You can store music, photos, movies, designs, manuals, programs, handouts in a quick speed The metal side has a 360 rotation, covering and protecting the usb end while carrying it around and turn back in any position, for the most comfortable use. Capless design with integrated loop makes it easy to attach to key chains, backpacks and etc. Mini design so that you can put it in pocket or any small space 1 year warranty, our products are of good quality and we promise that any problem about the product within one year since you buy, it will be guaranteed for free