Case Material/ Lens: Impact resistant Engineering polymer. Glass lens with shock resistant gasket seal - Dims/Weight: 2.30 (5.84 cm) - 2.97 (7.54 cm) depending on model - 1.12 oz. (32 grams) - 1.27 oz. (36 grams) with batteries; depending on model - Light Source: C4 LED technology impervious to shock with a 50000 hour lifetime; 640-660nm red laser - Light Output: 100 lumens; 2000 candela peak beam intensity; parabolic reflector produces a balance of beam and peripheral illumination. Optimized electronics provide regulated intensity; Laser provides long-range targeting - On/Off: Ambidextrous momentary/steady On-Off push-button switch Three modes: Laser only; both Laser/LED; LED only - Run Time: Runs 1 hour (LED only or LED/Laser combo); Laser only function runs 11 hours - Battery: Two CR-1/3N lithium batteries (included) - Features: - Ultra lightweight and compact - Batteries can be replaced while light remains mounted on gun - No need to resight laser after battery change - Windage and Elevation adjustment screws mounted in brass bushings for long life and dependable zero retention of laser - Operating temperature: -20