The Streamlight TLR2 is powered by two 3-volt CR123 lithium batteries with a 10-year storage life. This light is equipped with
C4® LED Technology which makes it impervious to shock with a 50,000 hour lifetime and is capable of producing up to 300 lumens measured system output and can run up to 2.5 hrs. The LASER ONLY runs 48 hours. A rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands at risk in front of muzzle. The mounting is fast, adjustable, and can securely mount to 1913 and Glock style Rails. Of course, this light is built with machined aluminum sealed construction with black anodized finish, is dustproof, and has an ambidextrous momentary/steady on/off switch.