The Nano Light II from Streamlight is an ultra-compact LED keychain flashlight that provides steady, bright light for one hour of run-time using a single AAAA alkaline battery. It fits easily onto a keychain or zipper pull. Measuring 2.2" in length, the light weighs 0.6 oz. and is double the brightness of its predecessor, the Nano Light. The light is constructed of machined aircraft-grade aluminum with an anodized black finish. Its white LED has a 50,000-hour lifetime. The light is waterproof and has a non-rotating snap hook for one-handed operation with an easy twist of the rotating on/off head switch. Its LED provides 20 lm, 120 candela, and a beam distance of 22m.