LaserMax S&W Shield Centerfire Laser Sight for use on M&P SHIELD Tough reinforced nylon design offers superior integration with firearm frame Easily programmable for steady or high-vis pulsed beam 10 minute automatic time-out prevents inadvertent battery drain Fully adjustable for windage and elevation 1/3 N Lithium Battery required; Class IIIa Laser Product: &lt;5mW power output