Stargazers and astronomy enthusiasts, this is a serious tool! The ScopeStuff #LAS5 is a Green Laser Pointer built for astronomy use. It's brand new, with a guaranteed power rating of 5 milliwatts (mW) and a wavelength of 532 nanometers (nm), which is the classic bright green. Why green? Because the human eye is most sensitive to green light, making it incredibly visible for pointing out stars and constellations in the night sky. It's classified as a Class 3B (IIIb) laser, which means it's powerful – NEVER point it at aircraft, vehicles, or people's eyes, and be aware of local regulations regarding laser pointers. The MPN is #LAS5. It's unbranded but sold by ScopeStuff, a known name in astronomy accessories. This is the kind of laser astronomy clubs use during star parties to trace out shapes in the sky. It runs on batteries (typically not included). A fantastic, precise tool for sharing the wonders of the night sky, but always use it responsibly and safely.