Deftun MSRX6 Smallest USB Magnetic Credit Card Reader Writer 1/4 Size of MSR206 Functions: Read, Write, Copy, Erase, Compare, Save to File, File to Write, Hi-Co & Lo-Co: All compatible (300~4000 oe); Tracks: Track 1,2,3; Swipe: Manual Single Direction; Operating Instructions: LED Power Supply: USB; Interface: USB; Standard: ISO7811/1~6,AAMVA,DMV Compliant OS: Windows 98/2000/ME/XP/vista/7/8 (32&64); Mac OS; Linux and Unix; Dimensions: 5.5X1.6X1.6 inch Weight: 145g (5 oz or 0.32lb)