Dimensions: 1.74” x 1.04” x .91”. Bright red laser marks point of impact on target. Constant or pulsing beam modes. Battery can be replaced without removal from rail. Adjustable windage and elevation. Fits Picatinny, Weaver, and Glock rails. Adjustable recoil lug. Operating temperature: -4F to 149F. Battery Life: 8 hours continuous mode and 18 hours in pulse mode. Boxed with hanging tab.