This 20mW Green Laser Pointer incorporates the latest technology in Diode Pumped Solid State Lasers. Impressed yet? Well you should be! Unlike a red beam, the green laser can be seen in mid-air in dark conditions so you can use it for constellations and star gazing.Or use your laser pointer to point out items on a projection screen, video monitor, or presentations. Just don't use it at the movies - that's annoying.