"Super Bright & Long-lasting - Powerful premium LED generates a brilliant beam with daylight color and definition. Runtime of up to 45 hours on low and 3 hours on high. (Powered by 3 AAA batteries - not included.) Lightweight and Comfortable - Weighing only 1.8 oz (3 oz with batteries), it is the ideal headlamp accessories for runners and outdoor adventurers. The removable, washable, and adjustable headband comfortably fits adults and children alike. Weather and Shock Resistant - Water resistant and drop tested to stand up to harsh conditions, the S500 headlamp is suitable for rain or snow, indoors or outdoors. It is the perfect addition to your running, camping, fishing, hiking, backpacking, hunting, or cycling gear. Pivoting 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 choose from 7 lighting modes. ( White Beam: Low, Medium, High, Strobe I Red Beam: Low, SOS, Strobe) Exceptional Value, Includes 2 Headlamps - Store one in your car, keep one in your home, or gift one to a friend or family member."