This is a new small flashlight by Princeton-Tec but has a Maxbright LED which provides a narrow beam at 45 Lumens! It operates on two AAA batteries (included) and burns for 72 hours. Waterproof to 100 meters, it is impact resistant and ergonomically designed with a Lexan body. It has a built-in Carabiner loop which is also a bottle opener. Simply twist the front bezel and you have a very bright light to lead you on any adventure or emergency situatiion. This is a great light for bug-out bags. It measures 3-7/8" long by 1-1/4" diameter at its widest, and weighs only 2 oz. Available in Black or Neon Yellow.