Handgun Laser Sight. Designed for Railed Pistols Bright green or red laser marks point of impact on target Compact, lightweight design for comfortable concealed carry Constant or pulsing beam modes Single battery design for easy replacement without removing laser from the rail Easy ambidextrous activation for left and right-handed users Adjustable windage and elevation Fits Picatinny / Weaver-style, Glock®, and many other pistol rails Adjustable recoil lug for versatile positioning Battery life: 8 hours continuous, 18 hours in pulse mode Operating temperature: -4°F (-20° C) to 149°F (65° C)