Advantages: serial, USB two interfaces, applications and more convenient. USB interface can be hot plug, plug and play. Using the latest DSP technology, customs-free adjustment of optical, software, eight adjustable speed. 
 Application: large, medium and primary schools on standardized tests, teaching evaluation, school management and other fields. 
 One way to read single-sided card reader 
 And automatically send cards 
 40 Road photoelectric sensor 
 Reading speed ≥ 2 / s (calculated according to A4 format) 
 Information Card Size 130mm × 50mm - 300mm × 210mm 
 Information card thickness 70--150g/m2 
 Information card out from 5.08mm 
 Overlay allows card error ± 0.1mm, ± 0.2mm cut 
 Pencil identify Tiantu tools: pencil or pen 
 Full recognition: non-red, non-white variety of pencils, pens, ball-point pen 
 James Point area of ≥ 2mm × 1mm 
 BER ≤ 1 × 10-7 
 Double sheet rate ≤ 1 × 10-4 
 Rate of ≤ 1 × 10-4 jam 
 Select a point radio, checkbox, BCD code 
 Format identify 26 species, up to 256 commands for each format 
 USB communication port, serial port 
 It is connected with the host PC 586 or more, notebook