https://www.kitlaser.com/blue-laser-pointers.html
A cheap laser pointer blue with a laser diode. The oscilloscope signs are usually used in a red laser diode, usually the most powerful. Enough specific specified projections to see a bright spot on the projector. But remember, concentrated beams emit higher intensity laser diodes. It’s very small in relatively weak laser diodes. However, many people still have a powerful laser pen in many ways that produce a visible beam of light, “these types of night ads.” That’s not surprising, because these diodes have high emissions of lasers that have a lot of resistance! Pheromone can only work with the science fiction laser pointer.