Super Bright & Long Lasting - Powerful premium LEDs produce bright beams with daylight color and clarity. Run time up to 45 hours at low speed and 3 hours at high speed. (Powered by 3 AAA batteries - not included.) Lightweight and Comfortable - Weighing only 1.8 ounces (3 ounces with battery), it is the ideal headlight accessory for runners and outdoor adventurers. The removable, washable and adjustable headband comfortably fits both adults and children. Weather and Shock Resistance - Waterproof and drop tested to withstand harsh conditions, the S500 headlamp is suitable for rain and snow, indoors or outdoors. It's the perfect addition to your running, camping, fishing, hiking, backpacking, hunting or cycling gear. Rotating Head and 7 Modes - This 45-degree adjustable headlight gives you the freedom to direct light exactly where you need it - even in tight spaces. Quickly select from 7 lighting modes. (white light: low, medium, high, strobe I red light: low, SOS, strobe)