... ,answer sheets, or other OMR marks sheets 2, small and portable, only 0.8kg weight 3, hand feed * Specifications:Feeding ... 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 ...