Casio DT-X400 Series User Manual page 28

Bar Code Scanning Position
Position the laser scanner close to the bar code when scanning small bar codes.
Position the laser scanner at a distance from the bar code so that the bars enter the light
when scanning large bar codes.
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Warning!
■ Never look directly into the laser light.
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• The products with the integrated Laser Scanner module scan bar codes
using laser light. Never look directly into the laser light or shine the laser
light into the eyes.
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