Case Material: Machined aluminum construction with anodized finish. Available in Black. Dimensions: Length: 3.26 in.(8.28 cm) Width: 1.47 in. (3.73 cm) Height: 1.44 in. (3.65 cm) Weight: 4.18 oz (118.6 grams)* Lens: High temperature, shock mounted, impact resistant, Boro Float Glass lens. Light Source: 3 Watt Luxeon® LED, impervious to shock with a 20,000 hour lifetime. Light Output: LED Rating: 80 Lumens typical. Deep-dish parabolic reflector produces long-range targeting beam with optimum peripheral illumination to aid navigation. On/Off: Ambidextrous momentary/steady On-Off switch Run Time: 2.5 hours continuous run time. Solid-state current regulation for consistent illumination level. Battery: Two (2) 3 Volt lithium batteries Features: • MIL-SPEC 810F Performance Tested • Super Hi Flux LED, ambidextrous momentary/steady On-Off switch • One handed snap-on and tighten interface keeps hands away from muzzle when attaching/detaching. Securely fits a broad range of weapons • Includes Glock, S&W, and Picatinny rail keys. Glock key installed. • Extensively live-fire tested impact resistant construction • Operating temperature: -40°F to +120°. • Waterproof to one meter