Economical laser pointers are useful for many optical experiments. Ideal for middle school and high school classrooms. Lasers operate on a push-button switch, are housed in a rubberized aluminum pen-style case, and include a pocket clip. The 6” long x 0.5” diameter Class 2 Red laser pointer has a maximum output of 1mW and a wavelength of 650nm (+/- 10nm). Range of beam is 75 meters. Operates on two “AAA” batteries (included). The 6” long x 0.5” diameter Class 2 Green laser pointer has a maximum output of 1mW and a wavelength of 532nm (+/- 10nm). Range of beam is 125 meters. Operates on two “AAA” batteries (included).