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Cordless CCD Barcode ScannersThese devices use a series of Light Emitting Diodes to generate a "red glow" light source, a lens and a photo conductor to decode a barcode image into the data that is contained in the barcode. Since the red glow is not very intense and the technology relies on emitted ambient light, so the operator will need to place the scanner fairly close to the barcode (about 2-3cm).
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