Taclight is made from air-craft grade aluminum and can withstand extreme temperatures from freezing to boiling. It is water-proof and shock resistant. Taclight has built-in zoom function and high-powered bulbs are 40x brighter than your regular flashlight. It has 5 modes high brightness medium brightness low brightness Strobe (intermittent flashing) SOS (emergency signal). Taclight Tactical Flashlight provides you with with up to 100 000 hours of ultra bright light just add 3 AAA Batteries (sold separately) & you re good to go!