... sheets, or other OMR marks sheets 2, small and portable, only 0.8kg weight 3, hand feed * Specifications ... 0°C~50°C,Humidity: 35%~95%, no erosive gas* Form designed standard:Form’s width:79mm=3.11inForm’ ... pencil, pen, signing pen or ball point pen A portable optical mark reader (or named: OMR scanner), small ... volume and be portable, or easy to be put into the auto-service ...