TruGlo 56000000 Sight-Line Red Laser TG. 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: -4F (-20 C) to 149F (65 C) Specifications for Truglo 560000007620R Sight-Line Red Laser