NcSTAR Blue Laser with Quick-Release Mount Compact Blue Laser with a Quick Release Weaver/Picatinny type rail mount that will fit most Weaver/ Picatinny/ MIL-STD 1913 type rails. Blue Laser: Freq. 450nm, Class IIIa Laser, Maximum Output: &lt;5mw Fully Adjustable for Windage and Elevation. Includes adjustment tool Push Button Rubber switches on both sides of laser body to turn laser On/Off. Uses 1 CR123A Lithium Type Battery (Included) Class IIIA Laser Product, 5mW power output