TWIST FOCUS OPTIC: The Simple Twist Focus System Goes From An Ultra View Flood Beam To Bulls-Eye Spot Beam BRIGHT: 500 Lumens In A Small Package Perfect For A Pocket And Every Day Carry For Medical Personnel, Law Enforcement, Pilots, Military, And More DUAL POWER: This Light Operates With Both Standard Alkaline Batteries And Our Custom Rechargeable Batteries. Battery Cartridge And Batteries Included TOUGH AND RELIABLE: IP54 rated design for water resistance and durable body for 1-meter drop protection. Backed by the COAST Lifetime warranty against defects in materials and workmanship HERITAGE: For 100 Years, And Three Generations Of The Brands Family, Coast Has Made Products That Make People’s Jobs And Recreation Easier, Safer And More Enjoyable