The SCR-300, is a TAA Compliant input device designed for GSA sales to goverment agencies, the military, their suppliers & vendors, & other organizations requiring end products manufacturered to U.S. Trade Agreement Act Specifications. CAC (Common Access Card) smart card reader is an easy-to-install USB device suited for all contact smart card operations like online-banking or digital signature applications. Supports banks, post offices, chip cards issued all over the country. Can be used for CAC (Common Access Card), government iD, & national ID. Features LED light indicator showing id the reader is reading the card correctly or incorrectly. Measures 3.2 x 2.5 x 2.5. Connector / Port / Interface: USB; for Use With: Smart Cards; Operating System Compatibility: Mac OS x 10.6 & Later; Windows 2000, XP, Vista, 7, 8, 10.