Pen — Lazer

: Typically AAA or lithium-ion batteries that provide the electrical energy.

The term "laser" is an acronym for . Inside the sleek casing of a laser pen, several components work in unison: lazer pen

: A lens at the tip focuses the scattered light into a tight, parallel beam that stays concentrated over long distances. A Spectrum of Colors : Typically AAA or lithium-ion batteries that provide