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200mw Laser Detector Money

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Lasers are classified safely according to the possibility of damage to human eyes and skin. The law requires that most laser products have a label listing this category. It will be listed in Arabic numerals (12, 3A, 3B, 4) or Roman numerals (I, II, IIIA, IIIB, IV). The risk of type 1 lasers is very low and "safe in a reasonably predictable range of use", including the use of optical instruments for in-beam observation. Lasers have wavelengths between 302.5 and 4000 nm, which are safe except for use with optical aids such as binoculars.