Your students will be fascinated by this pen-sized laser. A wide variety of physical science demonstrations can be conducted with this inexpensive laser, or it may simply be used in lectures. The laser beam projects a brilliant red dot, which can be seen easily in either a well-lit or darkened room. Arrives in a handy storage case with directions. Powered by two AAA batteries, which are included.
Wavelength: 645 nm Power output: > 5 mW Range: 2,000 ft (600 m) in darkness