Penna laser puntatore laser blu messa a fuoco fissa BP3 450 nm raggio visibile e confezione regalo

Wave Length： 450nm. The laser IS bright! Battery Direction： The Battery "+" Is Toward End of The Laser Pen. Flare Forms： Plaque-Forming - Circle. Just like the laser pointers you use to play with your pets, you should ALWAYS avoid direct eye exposure to laser beam.

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