LaserMax Uni-Max-ES Rifle Value PackFeatures:- Constant red laser beam - Highest power output laser commercially available- Keep all your rail space with a built in extra rail - Small as a matchbox - requires 1.75 of rail space - Super rugged - survives multiple drops to concrete! We even baked it to 350 deg Fahrenheit! It still works! - Adjustable windage and elevation setting for precise alignment - Maintains alignment through battery changes- Also includes Momentary switch and MantaRail systemSpecifications:- For: Picatinny; Mil-Spec; Weaver Style Rails (w/ minimum rail length of 1.75)- Battery Type: 357 (2)- Accuracy: User-adjusted for windage & elevation- Laser Operating Temperature: 5F - 150F- Wavelength: 650nm (red)- Power Output: 5mW- Spot Size: 5/16 @ 7 Yds; 3/4 @ 25 Yds