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Different types of laser pointer can show different colours of light, and the apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the chromatic response of the human eye. The laser pointer can be used to highlight something of interest by projecting a small bright spot of coloured light onto it. Bright spot, low divergence, good collimation, small size. Low power consumption, high-performance optical power output. Stable performance, good consistency, long service life. It can be used in different areas which include educational and business presentations, architecture, astronomy, camp and adventure, and entertainment etc. Best choice for teachers, professors, doctors, and so on. In addition, it is lightweight and handy, easy to carry and suitable for put in your pocket or handbags. Just Remove Disco Light Effect Cap From Pen To Get Straight Pointer Light For Presentation. Laser 100 to 300 ft. during the day and up to 1000 ft. at night. Up to 50 times more powerful than most other laser pointers.