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The blue laser is a laser that emits electromagnetic radiation at a wavelength of between 400 and 500 nanometres, which the human eye sees as blue or violet. Blu-ray is because fewer low-power, so blue laser pen is a high-power. High powered blue laser diode can launch a brightest beam light, attacking laser is strong enough to burn cigarette or match, blasting balloon, even igniting all combustible materials. Which is also a astronomy and military laser pointer pen, the preferred equipment for astronomy enthusiasts, outdoor enthusiasts.
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