Opluz OPM694 USB2.0 Common Access CAC Smart Card Reader | Chip Credit Card Reader | CCID Compatible for Windows 7 Vista XP and Linux Computers Read COC/DOD Military Card --- Reads smart cards and military Common Access Cards (CAC) & DOD military card & chip card. Compatible with Windows and Mac --- Compatible with Microsoft Windows XP/Vista/Windows 8/ Vista XP/Me & Linux. Auto Detect Card Memory --- Plug and play; Hot swapping; Auto detect card memory; USB-powered (no external power or battery needed). Application Card Types --- ISO7816 Class A, B and C (5V/3V/1.8V) Smart Cards. After-sale Service --- 24-month Hassle-free Manufacturer's Warranty/ Free Lifetime Technical Support/ Money Back in 3 months.