... input:DC 12V,1.5AInterfaceUSB or DB9(RS232 protocol)Operating system:Windows 98/XP/2000/7, Linux, MacSDK for developmentDLL ... Net Weight: 0.8kg * Application fields: Lottery Industry (lotto), scoring system for standard examinations in colleges, high school and elementary school ... , staff examination, and at anywhere large amounts of data entry, statistics and analysis is required. 2012 optical omr