Reading mode:     double-face and read two times     Feeding mode:     automatic     Speed:     1-3pcs/sec (based on A4)     Form size:     130mm*50mm-300mm*210mm     Form thickness:     70-150g/m 2     Track distance:     4.23mm (5.08mm, 7.00mm)     Tolerance:     cutting±0.2mm     Marking tools:     pencil read head: pencils and carbon pen pen read head: pencils, pens, ball-point; pens (non-red, non-white)     Size of mark:     2mm*1mm     Error rate:     1*10 -7     Double-sheet rate:     1*10 -4     Check rate:     1*10 -4     Mark choice:     single choice, multiple choice and BCD code     Format:     26 kinds, each has 256 commands at most     Bar code:     128 code, 39 code and 25 code     Communicate interface:     RS232 serial and USB interface     Host:     PC 586 or faster, notebook PC     Weight:     8kg     Operating system:     Win2000 or Win XP     Power supply:     AC100-240V, 50-60Hz     Packing size:     560mm*170mm*400mm     Environment:     temperature 0-40°C, humidity 90%, no erosive g