For use on Glock 26/27/33 (Gen 4) n/a Imported Battery Life: Approx. 1-3 hours continuous use Lens: GlassLaser Design: Internal guide-rod Alignment: Self-aligning Activation: Ambidextrous fingertip; Class IIIa Laser Product: &lt;5mW power output Class IIIA laser, &lt;5mW power output