smallest usb magstripe credit card reader writer deftun msrx6 smallest usb magnetic credit card reader writer 1/4 size of msr206 works on mac os world's first usb powered manual swipe smallest magnetic card reader/writer msr x6 is designed in usa to offer a card reading/writing solution for iso 7811-6 formats. directly powered by usb. no need for extra power adapter. very small in size makes it handy for travel. works with all the major operating systems as windows 7, 8, vista, xp, 2000(32 or 64 bits)and apple computers(macbook air, macbook pro, mac mini, macbook pro, imac) and unix, linux even android. read: yes write / rewrite: yes copy: yes erase: yes compare: yes save to file: yes file to write: yes password for login: yes plug and play: yes (not need usb driver) software: yes. package: 1). 1x magnetic card reader/writer, msrx6. 2). 1x software cd. 3). 1x usb cable. 4). 1x clearning card. 5). 20 blank hico magnetic card