The TLR-1 Game Spotter features a shock-proof green C4 LED that produces a long-range beam which reaches 350-meters. Green LED combined with a deep-dish parabolic reflector produces an intense hot-spot that provides long-range identification, preserves night vision and won't spook varmints. Green C4 LED delivers 31,000 candela peak beam intensity; 150-lumen Runs 1.75-Hours. Uses two 3V CR123A lithium batteries (included). Tethered battery door and latch mechanism prevents battery door loss while providing easy battery replacement. One handed snap-on and tighten interface keeps hands away from muzzle when attaching/detaching. Mounts directly to MIL-STD-1913 (Picatinny) rails and weapons with Glock-style rails. Includes rail locating keys for mounting to a variety of rails. Operating temperature: -40 to +120 Degree Fahrenheit. IPX7 waterproof to 1-meter for 30-Minutes. Length with standard switch: 4.83-inch (12.27 cm); 5.3-ounce (150.3 grams) with batteries.