Description GM803 serial have GM803-S and GM803-L model. The only difference between GM803-S and GM803-L is the lens. GM803-S lens reading distance is 5-30cm. GM803-L lens reading distance is 7-50cm. ...View More
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GROW GM803 Series Small Cheap DC3.3V USB/TTL232 Interface Barcode Scanner Module 1D/2D QR Bar Code Reader PDF417 for Arduino