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A laser pointer is a small laser designed to highlight something of interest by projecting a small bright spot of colored light onto it. The laser beam is not in itself visible from the side, but is visible as a result of light scattered by dust particles along the beam path. Brightness: green> red> blue-violet light Price: red <green <blue-violet light Poly thermal performance (ignition): green <red = violet light Stability: green <red = violet light