Zhumell

Whether you're giving a lecture on the evening sky, or deconstructing pie charts in the boardroom, you will appreciate the power of the Zhumell Green Astronomical Laser.  The 5mW laser diode produces a 532nm green beam which is visible for up to 0.5 miles (0.8km).  Not to be confused with red lasers of the same power, this unit looks brighter because it falls in the region of the spectrum of the human eye's greatest sensitivity.

Laser wavelength is 532 nm

5mW of power

Beam visible up to approximately 1/2 mile (0.8 km)

Please Note:

As with any laser, never look directly into the beam, or shine it into the eyes of pets, since the coherent light will irreparably damage retinas

When pointing out areas of interest in the sky, be especially careful to avoid spotting passing aircraft