The Twin-Task L1 LED flashlight from Streamlight delivers two critical illumination functions in one lightweight package. Switch on the C4 LED when you need a bright, even beam with a brilliant hotspot in the distance.Or run the three bright LEDs for area illumination and to conserve battery time. The Twin-Task's durable construction features an unbreakable polycarbonate lens, impact resistance and water resistance. All openings are protected by O rings to keep out dirt, moisture and debris. It requires a 3-volt CR123A battery for up to 13 hours runtime.The C4 LED has a 50,000 hour lifetime,and the three ultra-bright white LEDs operate for 100,000 hours.