Flashlight uses Coast's Pure Beam Focusing Optic System with Slide Focus to harness the light and create a superior beam quality from spot to flood. The Bulls Eye spot beam pattern gives you a great focused spot while producing an outer ring of flood light which allows you to see a broader area to the sides. The flood beam is broad and consistent, giving you a clear field of vision not seen with typical focusing flashlights. A quick cycle switch allows you to select between a high output setting to a low output setting with ease. Built tough, an impact-resistant, lightweight aluminum casing resists rust and corrosion. The HP550 also features an unbreakable LED and rubberized O-ring for reliable water resistance and durability.